ci: Fix build and publish workflow (#49)

* feat: Provide linux/amd64 and linux/arm64 images
* fix: Fix lack of description under "About this version" on package version index

.github/workflows/build.yml

@@ -0,0 +1,72 @@
+name: Build image
+
+on:
+  workflow_dispatch:
+  push:
+    branches: main
+  pull_request:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        platform:
+          - linux/arm64
+          - linux/amd64
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Extract container metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}   
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=sha
+        env:
+          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index            
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      # login to ghcr only when tagged with "v*"
+      # - name: Login to image registry ${{ env.REGISTRY }}
+      #   uses: docker/login-action@v3
+      #   with:
+      #     registry: ${{ env.REGISTRY }}
+      #     username: ${{ github.actor }}
+      #     password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Build image with Buildx (don't push)
+      - name: Build image
+        id: build-and-push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          provenance: mode=max
+          sbom: true
+          outputs: |
+            type=image,name=target

.github/workflows/publish-containers.yml

@@ -0,0 +1,137 @@
+name: Publish container image to GHCR
+
+on:
+  release:
+    types:
+      - created
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-n-push-digest:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/arm64
+          - linux/amd64
+
+    steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Extract container metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}   
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+        # env:
+        #     DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index            
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to image registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          provenance: mode=max
+          sbom: true        
+          outputs: |
+            type=image,
+            name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},
+            push-by-digest=true,
+            name-canonical=true
+        env:
+          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index            
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"      
+    
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build-n-push-digest
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+        # env:
+        #   DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index            
+
+
+      - name: Login to image registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}  

Dockerfile

@@ -1,14 +1,14 @@
-FROM eclipse-temurin:21.0.2_13-jdk-alpine
+FROM --platform=$BUILDPLATFORM eclipse-temurin:21.0.2_13-jdk-alpine
 
 ARG BUILD_CONTEXT="build-context"
 ARG UID=worker
 ARG GID=worker
 ARG VERSION_UNOSERVER=2.0.1
 
 LABEL org.opencontainers.image.title="unoserver-docker"
-LABEL org.opencontainers.image.description="Custom Docker Image that contains unoserver, LibreOffice and major set of fonts for file format conversions"
+LABEL org.opencontainers.image.description="Custom Container Image that contains unoserver with LibreOffice and major set of fonts for file format conversions"
 LABEL org.opencontainers.image.licenses="MIT"
-LABEL org.opencontainers.image.documentation="https://github.com/unoconv/unoserver-docker/blob/master/README.adoc"
+LABEL org.opencontainers.image.documentation="https://github.com/unoconv/unoserver-docker/blob/main/README.adoc"
 LABEL org.opencontainers.image.source="https://github.com/unoconv/unoserver-docker"
 LABEL org.opencontainers.image.url="https://github.com/unoconv/unoserver-docker"
 

README.adoc

@@ -1,10 +1,10 @@
-= Unoserver Docker Image
+= Unoserver Container Image
 
-Docker image for unoserver
+Container image for unoserver
 
 == The environment
 
-This Docker image uses Alpine Linux as a base image and provides:
+This Container image uses Alpine Linux as a base image and provides:
 
 * link:https://www.libreoffice.org/[LibreOffice]
 * link:https://github.com/unoconv/unoserver[unoserver]
@@ -25,6 +25,8 @@ This Docker image uses Alpine Linux as a base image and provides:
 
 == How to use it
 
+NOTE: The `docker` can normally be replaced with `podman` as well.
+
 === In interactive mode
 
 Just run:
@@ -80,6 +82,7 @@ You need the following tools:
 
 === How to build
 
+[source,bash]
 ----
 docker build .
 ----