diff --git a/.config b/.config
new file mode 120000
index 0000000..2070b4b
--- /dev/null
+++ b/.config
@@ -0,0 +1 @@
+upstream/.config
\ No newline at end of file
diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..11dd08c
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,33 @@
+---
+kind: pipeline
+name: default
+
+steps:
+  - name: update submodules
+    image: alpine/git
+    commands:
+      - git submodule init
+      - git submodule update
+
+  - name: run update.sh
+    image: debian:buster-slim
+    commands:
+      - bash update.sh
+
+  - name: build 16.0 image
+    image: plugins/docker
+    settings:
+      context: 16.0/unit
+      repo: eumau/nextcloud
+      tags:
+        - 16.0
+        - latest
+        - 16.0-unit
+        - latest-unit
+      username:
+        from_secret: dockerhub_username
+      password:
+        from_secret: dockerhub_password
+    when:
+      branch:
+        - master
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8279a3e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+*~
+\#*
+.#*
+*.bak
+/14.0/
+/15.0/
+/16.0/
+/*-rc/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..18e8ce4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "docker"]
+	path = upstream
+	url = https://github.com/nextcloud/docker.git
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..e297556
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,78 @@
+language: bash
+services: docker
+
+branches:
+  only:
+    - master
+
+# preload images to avoid timeouts in tests
+before_install:
+  - docker pull mariadb:10
+  - docker pull postgres:11-alpine
+
+install:
+  - git clone https://github.com/docker-library/official-images.git ~/official-images
+
+before_script:
+  - env | sort
+  - wget -qO- 'https://github.com/tianon/pgp-happy-eyeballs/raw/master/hack-my-builds.sh' | bash
+  - image="nextcloud:${VERSION}${VARIANT:+-$VARIANT}"
+  - if [[ "$ARCH" == 'i386' ]]; then sed -i -e 's/FROM php/FROM i386\/php/g' "${VERSION}/${VARIANT}/Dockerfile"; fi
+
+script:
+  - |
+    (
+      set -Eeuo pipefail
+      set -x
+      travis_retry docker build -t "$image" "${VERSION}/${VARIANT}"
+      travis_retry ~/official-images/test/run.sh "$image"
+      .travis/test-example-dockerfiles.sh "$image"
+    )
+
+after_script:
+  - docker images
+
+jobs:
+  # https://github.com/docker-library/php/issues/822
+  allow_failures:
+    - env: VERSION=15.0 VARIANT=apache ARCH=i386
+    - env: VERSION=16.0 VARIANT=apache ARCH=i386
+    - env: VERSION=17.0 VARIANT=apache ARCH=i386
+    - env: VERSION=15.0-rc VARIANT=apache ARCH=i386
+    - env: VERSION=16.0-rc VARIANT=apache ARCH=i386
+    - env: VERSION=17.0-rc VARIANT=apache ARCH=i386
+    - env: VERSION=17.0-beta VARIANT=apache ARCH=i386
+  include:
+    - &test-scripts
+      stage: test scripts
+      env: SCRIPT=update.sh
+      services: []
+      install: skip
+      before_script: skip
+      script:
+        - hash_before=$(git write-tree)
+        - travis_retry ./update.sh
+        - bash -c "[[ $hash_before = $(git add -A && git write-tree) ]]"
+      after_script: skip
+
+    - <<: *test-scripts
+      env: SCRIPT=generate-stackbrew-library.sh
+      install:
+        - wget -O "$HOME/bin/bashbrew" https://doi-janky.infosiftr.net/job/bashbrew/lastSuccessfulBuild/artifact/bin/bashbrew-amd64
+        - chmod +x "$HOME/bin/bashbrew"
+      script:
+        - travis_retry ./generate-stackbrew-library.sh
+
+    - stage: test images
+      env: VERSION=15.0-rc VARIANT=unit ARCH=amd64
+    - env: VERSION=15.0-rc VARIANT=unit ARCH=i386
+    - env: VERSION=16.0-rc VARIANT=unit ARCH=amd64
+    - env: VERSION=16.0-rc VARIANT=unit ARCH=i386
+    - env: VERSION=17.0-rc VARIANT=unit ARCH=amd64
+    - env: VERSION=17.0-rc VARIANT=unit ARCH=i386
+    - env: VERSION=14.0 VARIANT=unit ARCH=amd64
+    - env: VERSION=14.0 VARIANT=unit ARCH=i386
+    - env: VERSION=15.0 VARIANT=unit ARCH=amd64
+    - env: VERSION=15.0 VARIANT=unit ARCH=i386
+    - env: VERSION=16.0 VARIANT=unit ARCH=amd64
+    - env: VERSION=16.0 VARIANT=unit ARCH=i386
diff --git a/Dockerfile-unit.template b/Dockerfile-unit.template
new file mode 100644
index 0000000..c3197a9
--- /dev/null
+++ b/Dockerfile-unit.template
@@ -0,0 +1,95 @@
+FROM eumau/nginx-unit:%%UNIT_VERSION%%-php%%PHP_VERSION%%
+
+# entrypoint.sh and cron.sh dependencies
+RUN set -ex; \
+    \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        rsync \
+        bzip2 \
+        busybox-static \
+    ; \
+    rm -rf /var/lib/apt/lists/*; \
+    \
+    mkdir -p /var/spool/cron/crontabs; \
+    echo '*/15 * * * * php -f /var/www/html/cron.php' > /var/spool/cron/crontabs/www-data
+
+# install the PHP extensions we need
+# see https://docs.nextcloud.com/server/stable/admin_manual/installation/source_installation.html
+RUN set -ex; \
+    \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+    	php-exif \
+        php-gd \
+	php-intl \
+	php-ldap \
+	php-opcache \
+	php-mysql \
+	php-pgsql \
+	php-zip \
+	php-apcu \
+	php-memcached \
+	php-redis \
+	php-imagick \
+    ; \
+    \
+    rm -rf /var/lib/apt/lists/*
+
+# set recommended PHP.ini settings
+# see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
+RUN { \
+        echo 'opcache.enable=1'; \
+        echo 'opcache.interned_strings_buffer=8'; \
+        echo 'opcache.max_accelerated_files=10000'; \
+        echo 'opcache.memory_consumption=128'; \
+        echo 'opcache.save_comments=1'; \
+        echo 'opcache.revalidate_freq=1'; \
+    } > /etc/php/7.3/embed/conf.d/opcache-recommended.ini; \
+    \
+    echo 'apc.enable_cli=1' >> /etc/php/7.3/embed/conf.d/docker-php-ext-apcu.ini; \
+    \
+    echo 'memory_limit=512M' > /etc/php/7.3/embed/conf.d/memory-limit.ini; \
+    \
+    mkdir -p /var/www/data; \
+    chown -R www-data:root /var/www; \
+    chmod -R g=u /var/www
+
+VOLUME /var/www/html
+%%VARIANT_EXTRAS%%
+
+ENV NEXTCLOUD_VERSION %%VERSION%%
+
+RUN set -ex; \
+    fetchDeps=" \
+        gnupg \
+        dirmngr \
+    "; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends $fetchDeps; \
+    \
+    curl -fsSL -o nextcloud.tar.bz2 \
+        "%%BASE_DOWNLOAD_URL%%/nextcloud-${NEXTCLOUD_VERSION}.tar.bz2"; \
+    curl -fsSL -o nextcloud.tar.bz2.asc \
+        "%%BASE_DOWNLOAD_URL%%/nextcloud-${NEXTCLOUD_VERSION}.tar.bz2.asc"; \
+    export GNUPGHOME="$(mktemp -d)"; \
+# gpg key from https://nextcloud.com/nextcloud.asc
+    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys 28806A878AE423A28372792ED75899B9A724937A; \
+    gpg --batch --verify nextcloud.tar.bz2.asc nextcloud.tar.bz2; \
+    tar -xjf nextcloud.tar.bz2 -C /usr/src/; \
+    gpgconf --kill all; \
+    rm -r "$GNUPGHOME" nextcloud.tar.bz2.asc nextcloud.tar.bz2; \
+    rm -rf /usr/src/nextcloud/updater; \
+    mkdir -p /usr/src/nextcloud/data; \
+    mkdir -p /usr/src/nextcloud/custom_apps; \
+    chmod +x /usr/src/nextcloud/occ; \
+    \
+    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps; \
+    rm -rf /var/lib/apt/lists/*
+
+COPY *.sh upgrade.exclude /
+COPY config/* /usr/src/nextcloud/config/
+
+ENTRYPOINT ["/entrypoint.sh"]
+STOPSIGNAL SIGTERM
+CMD ["unitd", "--no-daemon", "--control", "unix:/var/run/control.unit.sock"]
diff --git a/docker-cron.sh b/docker-cron.sh
new file mode 120000
index 0000000..53f9492
--- /dev/null
+++ b/docker-cron.sh
@@ -0,0 +1 @@
+upstream/docker-cron.sh
\ No newline at end of file
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
new file mode 100644
index 0000000..1ca0675
--- /dev/null
+++ b/docker-entrypoint.sh
@@ -0,0 +1,145 @@
+#!/bin/sh
+set -eu
+
+# version_greater A B returns whether A > B
+version_greater() {
+    [ "$(printf '%s\n' "$@" | sort -t '.' -n -k1,1 -k2,2 -k3,3 -k4,4 | head -n 1)" != "$1" ]
+}
+
+# return true if specified directory is empty
+directory_empty() {
+    [ -z "$(ls -A "$1/")" ]
+}
+
+run_as() {
+    if [ "$(id -u)" = 0 ]; then
+        su -p www-data -s /bin/sh -c "$1"
+    else
+        sh -c "$1"
+    fi
+}
+
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "$1" = "unitd" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
+    if [ -n "${REDIS_HOST+x}" ]; then
+
+        echo "Configuring Redis as session handler"
+        {
+            echo 'session.save_handler = redis'
+            # check if redis password has been set
+            if [ -n "${REDIS_HOST_PASSWORD+x}" ]; then
+                echo "session.save_path = \"tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}?auth=${REDIS_HOST_PASSWORD}\""
+            else
+                echo "session.save_path = \"tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}\""
+            fi
+        } > /usr/local/etc/php/conf.d/redis-session.ini
+    fi
+
+    installed_version="0.0.0.0"
+    if [ -f /var/www/html/version.php ]; then
+        # shellcheck disable=SC2016
+        installed_version="$(php -r 'require "/var/www/html/version.php"; echo implode(".", $OC_Version);')"
+    fi
+    # shellcheck disable=SC2016
+    image_version="$(php -r 'require "/usr/src/nextcloud/version.php"; echo implode(".", $OC_Version);')"
+
+    if version_greater "$installed_version" "$image_version"; then
+        echo "Can't start Nextcloud because the version of the data ($installed_version) is higher than the docker image version ($image_version) and downgrading is not supported. Are you sure you have pulled the newest image version?"
+        exit 1
+    fi
+
+    if version_greater "$image_version" "$installed_version"; then
+        echo "Initializing nextcloud $image_version ..."
+        if [ "$installed_version" != "0.0.0.0" ]; then
+            echo "Upgrading nextcloud from $installed_version ..."
+            run_as 'php /var/www/html/occ app:list' | sed -n "/Enabled:/,/Disabled:/p" > /tmp/list_before
+        fi
+        if [ "$(id -u)" = 0 ]; then
+            rsync_options="-rlDog --chown www-data:root"
+        else
+            rsync_options="-rlD"
+        fi
+        rsync $rsync_options --delete --exclude-from=/upgrade.exclude /usr/src/nextcloud/ /var/www/html/
+
+        for dir in config data custom_apps themes; do
+            if [ ! -d "/var/www/html/$dir" ] || directory_empty "/var/www/html/$dir"; then
+                rsync $rsync_options --include "/$dir/" --exclude '/*' /usr/src/nextcloud/ /var/www/html/
+            fi
+        done
+        rsync $rsync_options --include '/version.php' --exclude '/*' /usr/src/nextcloud/ /var/www/html/
+        echo "Initializing finished"
+
+        #install
+        if [ "$installed_version" = "0.0.0.0" ]; then
+            echo "New nextcloud instance"
+
+            if [ -n "${NEXTCLOUD_ADMIN_USER+x}" ] && [ -n "${NEXTCLOUD_ADMIN_PASSWORD+x}" ]; then
+                # shellcheck disable=SC2016
+                install_options='-n --admin-user "$NEXTCLOUD_ADMIN_USER" --admin-pass "$NEXTCLOUD_ADMIN_PASSWORD"'
+                if [ -n "${NEXTCLOUD_TABLE_PREFIX+x}" ]; then
+                    # shellcheck disable=SC2016
+                    install_options=$install_options' --database-table-prefix "$NEXTCLOUD_TABLE_PREFIX"'
+                fi
+                if [ -n "${NEXTCLOUD_DATA_DIR+x}" ]; then
+                    # shellcheck disable=SC2016
+                    install_options=$install_options' --data-dir "$NEXTCLOUD_DATA_DIR"'
+                fi
+
+                install=false
+                if [ -n "${SQLITE_DATABASE+x}" ]; then
+                    echo "Installing with SQLite database"
+                    # shellcheck disable=SC2016
+                    install_options=$install_options' --database-name "$SQLITE_DATABASE"'
+                    install=true
+                elif [ -n "${MYSQL_DATABASE+x}" ] && [ -n "${MYSQL_USER+x}" ] && [ -n "${MYSQL_PASSWORD+x}" ] && [ -n "${MYSQL_HOST+x}" ]; then
+                    echo "Installing with MySQL database"
+                    # shellcheck disable=SC2016
+                    install_options=$install_options' --database mysql --database-name "$MYSQL_DATABASE" --database-user "$MYSQL_USER" --database-pass "$MYSQL_PASSWORD" --database-host "$MYSQL_HOST"'
+                    install=true
+                elif [ -n "${POSTGRES_DB+x}" ] && [ -n "${POSTGRES_USER+x}" ] && [ -n "${POSTGRES_PASSWORD+x}" ] && [ -n "${POSTGRES_HOST+x}" ]; then
+                    echo "Installing with PostgreSQL database"
+                    # shellcheck disable=SC2016
+                    install_options=$install_options' --database pgsql --database-name "$POSTGRES_DB" --database-user "$POSTGRES_USER" --database-pass "$POSTGRES_PASSWORD" --database-host "$POSTGRES_HOST"'
+                    install=true
+                fi
+
+                if [ "$install" = true ]; then
+                    echo "starting nextcloud installation"
+                    max_retries=10
+                    try=0
+                    until run_as "php /var/www/html/occ maintenance:install $install_options" || [ "$try" -gt "$max_retries" ]
+                    do
+                        echo "retrying install..."
+                        try=$((try+1))
+                        sleep 3s
+                    done
+                    if [ "$try" -gt "$max_retries" ]; then
+                        echo "installing of nextcloud failed!"
+                        exit 1
+                    fi
+                    if [ -n "${NEXTCLOUD_TRUSTED_DOMAINS+x}" ]; then
+                        echo "setting trusted domains…"
+                        NC_TRUSTED_DOMAIN_IDX=1
+                        for DOMAIN in $NEXTCLOUD_TRUSTED_DOMAINS ; do
+                            DOMAIN=$(echo "$DOMAIN" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
+                            run_as "php /var/www/html/occ config:system:set trusted_domains $NC_TRUSTED_DOMAIN_IDX --value=$DOMAIN"
+                            NC_TRUSTED_DOMAIN_IDX=$(($NC_TRUSTED_DOMAIN_IDX+1))
+                        done
+                    fi
+                else
+                    echo "running web-based installer on first connect!"
+                fi
+            fi
+        #upgrade
+        else
+            run_as 'php /var/www/html/occ upgrade'
+
+            run_as 'php /var/www/html/occ app:list' | sed -n "/Enabled:/,/Disabled:/p" > /tmp/list_after
+            echo "The following apps have been disabled:"
+            diff /tmp/list_before /tmp/list_after | grep '<' | cut -d- -f2 | cut -d: -f1
+            rm -f /tmp/list_before /tmp/list_after
+
+        fi
+    fi
+fi
+
+exec "$@"
diff --git a/update.sh b/update.sh
new file mode 100755
index 0000000..085923f
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,236 @@
+#!/bin/bash
+set -eo pipefail
+
+declare -A php_version=(
+	[default]='7.3'
+	[14.0]='7.2'
+)
+
+declare -A unit_version=(
+	[default]='1.11.0'
+)
+
+declare -A base=(
+	[unit]='unit'
+)
+
+declare -A extras=(
+	[apache]='\nRUN a2enmod rewrite remoteip ;\\\n    {\\\n     echo RemoteIPHeader X-Real-IP ;\\\n     echo RemoteIPTrustedProxy 10.0.0.0/8 ;\\\n     echo RemoteIPTrustedProxy 172.16.0.0/12 ;\\\n     echo RemoteIPTrustedProxy 192.168.0.0/16 ;\\\n    } > /etc/apache2/conf-available/remoteip.conf;\\\n    a2enconf remoteip'
+	[fpm]=''
+	[fpm-alpine]=''
+	[unit]=''
+)
+
+apcu_version="$(
+	git ls-remote --tags https://github.com/krakjoe/apcu.git \
+		| cut -d/ -f3 \
+		| grep -vE -- '-rc|-b' \
+		| sed -E 's/^v//' \
+		| sort -V \
+		| tail -1
+)"
+
+memcached_version="$(
+	git ls-remote --tags https://github.com/php-memcached-dev/php-memcached.git \
+		| cut -d/ -f3 \
+		| grep -vE -- '-rc|-b' \
+		| sed -E 's/^[rv]//' \
+		| sort -V \
+		| tail -1
+)"
+
+redis_version="$(
+	git ls-remote --tags https://github.com/phpredis/phpredis.git \
+		| cut -d/ -f3 \
+		| grep -viE '[a-z]' \
+		| tr -d '^{}' \
+		| sort -V \
+		| tail -1
+)"
+
+imagick_version="$(
+	git ls-remote --tags https://github.com/mkoppanen/imagick.git \
+		| cut -d/ -f3 \
+		| grep -viE '[a-z]' \
+		| tr -d '^{}' \
+		| sort -V \
+		| tail -1
+)"
+
+declare -A pecl_versions=(
+	[APCu]="$apcu_version"
+	[memcached]="$memcached_version"
+	[redis]="4.3.0"
+	[imagick]="$imagick_version"
+)
+
+variants=(
+	unit
+)
+
+min_version='14.0'
+
+# version_greater_or_equal A B returns whether A >= B
+function version_greater_or_equal() {
+	[[ "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1" || "$1" == "$2" ]];
+}
+
+# checks if the the rc is already released
+function check_released() {
+	printf '%s\n' "${fullversions[@]}" | grep -qE "^$( echo "$1" | grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}' )"
+}
+
+# checks if the the beta has already a rc
+function check_rc_released() {
+	printf '%s\n' "${fullversions_rc[@]}" | grep -qE "^$( echo "$1" | grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}' )"
+}
+
+# checks if the the alpha has already a beta
+function check_beta_released() {
+	printf '%s\n' "${fullversions_beta[@]}" | grep -qE "^$( echo "$1" | grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}' )"
+}
+
+travisEnv=
+
+function create_variant() {
+	dir="$1/$variant"
+	phpVersion=${php_version[$version]-${php_version[default]}}
+	unitVersion=${unit_version[$version]-${unit_version[default]}}
+
+	# Create the version+variant directory with a Dockerfile.
+	mkdir -p "$dir"
+
+	template="Dockerfile-${base[$variant]}.template"
+	echo "# DO NOT EDIT: created by update.sh from $template" > "$dir/Dockerfile"
+	cat "$template" >> "$dir/Dockerfile"
+
+	echo "updating $fullversion [$1] $variant"
+
+	# Replace the variables.
+	sed -ri -e '
+		s/%%PHP_VERSION%%/'"$phpVersion"'/g;
+		s/%%UNIT_VERSION%%/'"$unitVersion"'/g;
+		s/%%VARIANT%%/'"$variant"'/g;
+		s/%%VERSION%%/'"$fullversion"'/g;
+		s/%%BASE_DOWNLOAD_URL%%/'"$2"'/g;
+		s/%%CMD%%/'"${cmd[$variant]}"'/g;
+		s|%%VARIANT_EXTRAS%%|'"${extras[$variant]}"'|g;
+		s/%%APCU_VERSION%%/'"${pecl_versions[APCu]}"'/g;
+		s/%%MEMCACHED_VERSION%%/'"${pecl_versions[memcached]}"'/g;
+		s/%%REDIS_VERSION%%/'"${pecl_versions[redis]}"'/g;
+		s/%%IMAGICK_VERSION%%/'"${pecl_versions[imagick]}"'/g;
+	' "$dir/Dockerfile"
+
+	if [[ "$phpVersion" != 7.3 ]]; then
+		sed -ri \
+			-e '/libzip-dev/d' \
+			"$dir/Dockerfile"
+	fi
+
+	# Copy the shell scripts
+	for name in entrypoint cron; do
+		cp "docker-$name.sh" "$dir/$name.sh"
+	done
+
+	# Copy the upgrade.exclude
+	cp upgrade.exclude "$dir/"
+
+	# Copy the config directory
+	cp -rLT .config "$dir/config"
+
+	# Remove Apache config if we're not an Apache variant.
+	if [ "$variant" != "apache" ]; then
+		rm "$dir/config/apache-pretty-urls.config.php"
+	fi
+
+	for arch in i386 amd64; do
+		travisEnv='    - env: VERSION='"$1"' VARIANT='"$variant"' ARCH='"$arch"'\n'"$travisEnv"
+	done
+}
+
+find . -maxdepth 1 -type d -regextype sed -regex '\./[[:digit:]]\+\.[[:digit:]]\+\(-rc\|-beta\|-alpha\)\?' -exec rm -r '{}' \;
+
+fullversions=( $( curl -fsSL 'https://download.nextcloud.com/server/releases/' |tac|tac| \
+	grep -oE 'nextcloud-[[:digit:]]+(\.[[:digit:]]+){2}' | \
+	grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}' | \
+	sort -urV ) )
+versions=( $( printf '%s\n' "${fullversions[@]}" | cut -d. -f1-2 | sort -urV ) )
+for version in "${versions[@]}"; do
+	fullversion="$( printf '%s\n' "${fullversions[@]}" | grep -E "^$version" | head -1 )"
+
+	if version_greater_or_equal "$version" "$min_version"; then
+
+		for variant in "${variants[@]}"; do
+
+			create_variant "$version" "https:\/\/download.nextcloud.com\/server\/releases"
+		done
+	fi
+done
+
+fullversions_rc=( $( curl -fsSL 'https://download.nextcloud.com/server/prereleases/' |tac|tac| \
+	grep -oE 'nextcloud-[[:digit:]]+(\.[[:digit:]]+){2}RC[[:digit:]]+' | \
+	grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}RC[[:digit:]]+' | \
+	sort -urV ) )
+versions_rc=( $( printf '%s\n' "${fullversions_rc[@]}" | cut -d. -f1-2 | sort -urV ) )
+for version in "${versions_rc[@]}"; do
+	fullversion="$( printf '%s\n' "${fullversions_rc[@]}" | grep -E "^$version" | head -1 )"
+
+	if version_greater_or_equal "$version" "$min_version"; then
+
+		if ! check_released "$fullversion"; then
+
+			for variant in "${variants[@]}"; do
+
+				create_variant "$version-rc" "https:\/\/download.nextcloud.com\/server\/prereleases"
+			done
+		fi
+	fi
+done
+
+fullversions_beta=( $( curl -fsSL 'https://download.nextcloud.com/server/prereleases/' |tac|tac| \
+	grep -oE 'nextcloud-[[:digit:]]+(\.[[:digit:]]+){2}beta[[:digit:]]+' | \
+	grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}beta[[:digit:]]+' | \
+	sort -urV ) )
+versions_beta=( $( printf '%s\n' "${fullversions_beta[@]}" | cut -d. -f1-2 | sort -urV ) )
+for version in "${versions_beta[@]}"; do
+	fullversion="$( printf '%s\n' "${fullversions_beta[@]}" | grep -E "^$version" | head -1 )"
+
+	if version_greater_or_equal "$version" "$min_version"; then
+
+		if ! check_rc_released "$fullversion"; then
+
+			for variant in "${variants[@]}"; do
+
+				create_variant "$version-beta" "https:\/\/download.nextcloud.com\/server\/prereleases"
+			done
+		fi
+	fi
+done
+
+fullversions_alpha=( $( curl -fsSL 'https://download.nextcloud.com/server/prereleases/' |tac|tac| \
+	grep -oE 'nextcloud-[[:digit:]]+(\.[[:digit:]]+){2}alpha[[:digit:]]+' | \
+	grep -oE '[[:digit:]]+(\.[[:digit:]]+){2}alpha[[:digit:]]+' | \
+	sort -urV ) )
+versions_alpha=( $( printf '%s\n' "${fullversions_alpha[@]}" | cut -d. -f1-2 | sort -urV ) )
+for version in "${versions_alpha[@]}"; do
+	fullversion="$( printf '%s\n' "${fullversions_alpha[@]}" | grep -E "^$version" | head -1 )"
+
+	if version_greater_or_equal "$version" "$min_version"; then
+
+		if ! check_beta_released "$fullversion"; then
+
+			for variant in "${variants[@]}"; do
+
+				create_variant "$version-alpha" "https:\/\/download.nextcloud.com\/server\/prereleases"
+			done
+		fi
+	fi
+done
+
+# remove everything after '- stage: test images'
+travis="$(awk '!p; /- stage: test images/ {p=1}' .travis.yml)"
+echo "$travis" > .travis.yml
+
+# replace the fist '-' with ' '
+travisEnv="$(echo "$travisEnv" | sed '0,/-/{s/-/ /}')"
+printf "$travisEnv" >> .travis.yml
diff --git a/upgrade.exclude b/upgrade.exclude
new file mode 120000
index 0000000..39e1730
--- /dev/null
+++ b/upgrade.exclude
@@ -0,0 +1 @@
+upstream/upgrade.exclude
\ No newline at end of file
diff --git a/upstream b/upstream
new file mode 160000
index 0000000..10a1fe7
--- /dev/null
+++ b/upstream
@@ -0,0 +1 @@
+Subproject commit 10a1fe7606cc7dd92cb10a1cd81a012604ebaaf5