Tweak workflows

.github/workflows/build_docker.yml

@@ -8,18 +8,22 @@ on:
 jobs:
   build-and-push-image:
     name: Docker Build
-    runs-on: self-hosted
+    runs-on: [self-hosted, ubuntu-latest]
     permissions:
       contents: read
       packages: write
 
     steps:
     - name: Set version
-      id: version
-      run: echo "::set-output name=version::$(echo ${GITHUB_REF#refs/tags/})"
+      id: buildvars
+      run: |
+        echo "version=$(echo ${GITHUB_REF#refs/tags/})" >> $GITHUB_OUTPUT
+        echo "built_at=$(date +%Y-%m-%dT%H:%M:%S)" >> $GITHUB_OUTPUT
+        echo "go_version=$(go version | cut -d ' ' -f 3)" >> $GITHUB_OUTPUT
+        echo "git_commit=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
 
-    - name: Check out the repo
-      uses: actions/checkout@v4
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
@@ -39,55 +43,52 @@ jobs:
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
+    # private image
     - name: Extract metadata (tags, labels) for Docker
+      if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
       id: meta
       uses: docker/metadata-action@v5
       with:
         images: ghcr.io/${{ github.repository }}
 
-    - name: Generate build variables
-      id: prep
-      run: |
-        echo "built_at=$(date +%Y-%m-%dT%H:%M:%S)" >> $GITHUB_OUTPUT
-        echo "go_version=$(go version | cut -d ' ' -f 3)" >> $GITHUB_OUTPUT
-        echo "git_commit=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
-
     - name: Build and push Docker image
+      if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
       uses: docker/build-push-action@v5
       with:
         context: .
-        platforms: linux/amd64,linux/arm64
+        platforms: linux/amd64,linux/arm64,linux/arm/v7
         push: true
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
         cache-from: type=local,src=/tmp/.buildx-cache
         cache-to: type=local,dest=/tmp/.buildx-cache
         build-args: |
-          BuiltAt=${{ steps.prep.outputs.built_at }}
-          GoVersion=${{ steps.prep.outputs.go_version }}
-          GitCommit=${{ steps.prep.outputs.git_commit }}
-          Version=${{ steps.version.outputs.version }}
+          BuiltAt=${{ steps.buildvars.outputs.built_at }}
+          GoVersion=${{ steps.buildvars.outputs.go_version }}
+          GitCommit=${{ steps.buildvars.outputs.git_commit }}
+          Version=${{ steps.buildvars.outputs.version }}
 
+    # public image
     - name: Extract metadata (tags, labels) for Docker
-      if: startsWith(github.ref, 'refs/tags/v')
+      if: ${{ startsWith(github.ref, 'refs/tags/v') }}
       id: publicmeta
       uses: docker/metadata-action@v5
       with:
         images: ghcr.io/${{ github.repository }}-testing
 
     - name: Build and push Docker image
-      if: startsWith(github.ref, 'refs/tags/v')
+      if: ${{ startsWith(github.ref, 'refs/tags/v') }}
       uses: docker/build-push-action@v5
       with:
         context: .
-        platforms: linux/amd64,linux/arm64
+        platforms: linux/amd64,linux/arm64,linux/arm/v7
         push: true
         tags: ${{ steps.publicmeta.outputs.tags }}
         labels: ${{ steps.publicmeta.outputs.labels }}
         cache-from: type=local,src=/tmp/.buildx-cache
         cache-to: type=local,dest=/tmp/.buildx-cache
         build-args: |
-          BuiltAt=$(date +%Y-%m-%dT%H:%M:%S)
-          GoVersion=$(go version)
-          GitCommit=$(git rev-parse HEAD)
-          Version=${{ steps.version.outputs.version }}
+          BuiltAt=${{ steps.buildvars.outputs.built_at }}
+          GoVersion=${{ steps.buildvars.outputs.go_version }}
+          GitCommit=${{ steps.buildvars.outputs.git_commit }}
+          Version=${{ steps.buildvars.outputs.version }}