build confd from source (multiarch)

.gitea/workflows/build.yml

@@ -35,25 +35,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       -
-        name: Build amd64
-        uses: docker/build-push-action@v5
-        with:
-          load: true
-          tags: ${{ matrix.repo }}:${{ matrix.version }}${{ matrix.variant }}
-          platforms: linux/amd64
-          build-args: |
-            TARGET_ARCH=amd64
-      -
-        name: Build arm64
-        uses: docker/build-push-action@v5
-        with:
-          load: true
-          tags: ${{ matrix.repo }}:${{ matrix.version }}${{ matrix.variant }}
-          platforms: linux/arm64
-          build-args: |
-            TARGET_ARCH=arm64
-      -
-        name: Push images
+        name: Build and push image
         uses: docker/build-push-action@v5
         with:
           push: true

Dockerfile

@@ -1,8 +1,18 @@
 ARG DEBIAN_VERSION=bullseye-slim
-FROM debian:${DEBIAN_VERSION}
+FROM golang:1.9-alpine as confd
 ARG CONFD_VERSION=0.16.0
-ARG TARGET_ARCH=amd64
-ADD https://github.com/kelseyhightower/confd/releases/download/v${CONFD_VERSION}/confd-${CONFD_VERSION}-linux-${TARGET_ARCH} /usr/local/bin/confd
+ADD https://github.com/kelseyhightower/confd/archive/v${CONFD_VERSION}.tar.gz /tmp/
+RUN apk add --no-cache \
+    bzip2 \
+    make && \
+  mkdir -p /go/src/github.com/kelseyhightower/confd && \
+  cd /go/src/github.com/kelseyhightower/confd && \
+  tar --strip-components=1 -zxf /tmp/v${CONFD_VERSION}.tar.gz && \
+  go install github.com/kelseyhightower/confd && \
+  rm -rf /tmp/v${CONFD_VERSION}.tar.gz
+
+FROM debian:${DEBIAN_VERSION}
+COPY --from=confd /go/bin/confd /usr/local/bin/confd
 RUN mkdir -p /start.d \
   && printf '#!/bin/bash\nset -e\n/usr/local/bin/confd -onetime -backend env\nrun-parts -v /start.d\nexec ${@}\n' > /entrypoint.sh \
   && mkdir -p /etc/confd/conf.d /etc/confd/templates \