Upgrade to bookworm, v4

.drone.yml

@@ -1,53 +0,0 @@
----
-kind: pipeline
-name: default
-
-steps:
-  - name: build and publish image
-    image: plugins/docker
-    settings:
-      repo: eumau/dovecot
-      auto_tag: true
-      username:
-        from_secret: dockerhub_username
-      password:
-        from_secret: dockerhub_password
-    when:
-      branch:
-        - master
-
----
-kind: pipeline
-name: pull_request
-
-steps:
-  - name: build image only
-    image: plugins/docker
-    settings:
-      repo: eumau/dovecot
-      auto_tag: true
-      dry_run: true
-
-trigger:
-  event:
-    - pull_request
-
----
-kind: pipeline
-name: tags
-
-steps:
-  - name: docker
-    image: plugins/docker
-    settings:
-      repo: eumau/dovecot
-      username:
-        from_secret: dockerhub_username
-      password:
-        from_secret: dockerhub_password
-      tags:
-        - ${DRONE_TAG}
-
-trigger:
-  event:
-    - tag

.gitea/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build Docker images
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        repo:
+          - "eumau/dovecot"
+        tag:
+          - "4"
+    steps:
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push image
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: ${{ matrix.repo }}:${{ matrix.tag }}
+          platforms: linux/amd64,linux/arm64

Dockerfile

@@ -1,4 +1,4 @@
-FROM eumau/debian:bullseye-slim
+FROM eumau/debian:bookworm-slim
 LABEL maintainer "Mauro Torrez <mauro@mau.ro>"
 ARG DEBIAN_FRONTEND=noninteractive
 ENV LC_ALL C