try multi-architecture build

.github/workflows/build-and-publish.yml

@@ -2,7 +2,7 @@ name: Build and Publish
 
 on:
   push:
-    branches: [ 'main', 'master' ]  # Trigger on push to 'main'& 'master' master will be remove step by step
+    branches: [ 'main', 'master', 'develop' ] # temporarily add 'develop' for testing multi-arch build
     tags: [ '[0-9]+.[0-9]+.[0-9]+' ]  # Trigger on version tags like '0.1.0'
 
 jobs:
@@ -13,6 +13,12 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Set up QEMU for multi-platform builds
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v3
         with:
@@ -38,15 +44,11 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
-          # labels: | 
-          #   org.opencontainers.image.source=${{ github.repository }}
-          #   org.opencontainers.image.revision=${{ github.sha }}
-          #   org.opencontainers.image.created=${{ github.event.head_commit.timestamp }}
 
       - name: Build and push Docker image to DockerHub and GHCR
         uses: docker/build-push-action@v5
         with:
-          context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64,linux/arm64

Dockerfile

@@ -4,9 +4,10 @@ RUN apk update \
  && apk add --no-cache bash
 
 ARG restic_ver=0.16.0
+ARG TARGETARCH
 
 RUN wget -O /tmp/restic.bz2 \
-    https://github.com/restic/restic/releases/download/v${restic_ver}/restic_${restic_ver}_linux_amd64.bz2 \
+    https://github.com/restic/restic/releases/download/v${restic_ver}/restic_${restic_ver}_linux_${TARGETARCH}.bz2 \
  && bunzip2 /tmp/restic.bz2 \
  && chmod +x /tmp/restic \
  && mv /tmp/restic /usr/local/bin/restic