feat: build docker images in CI

.github/workflows/docker-build.yml

@@ -0,0 +1,146 @@
+name: Publish Docker image
+
+on:
+  schedule:
+    - cron: '24 0 * * 1'
+  workflow_dispatch:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - 'master'
+
+env:
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write # needed for signing the images with GitHub OIDC Token
+      attestations: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 1
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install Cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@v3.3.0
+        with:
+          cosign-release: 'v2.2.2'
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata app
+        id: meta-app
+        uses: docker/metadata-action@v4.4.0
+        with:
+          images: ghcr.io/${{ env.IMAGE_NAME }}-app
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha,format=long
+
+      - name: Extract Docker metadata backend
+        id: meta-backend
+        uses: docker/metadata-action@v4.4.0
+        with:
+          images: ghcr.io/${{ env.IMAGE_NAME }}-backend
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha,format=long
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and Push App container images
+        uses: docker/build-push-action@v4
+        id: build-and-push-app
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta-app.outputs.tags }}
+          labels: ${{ steps.meta-app.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          file: ./app.dockerfile
+
+      - name: Build and Push Backend container images
+        uses: docker/build-push-action@v4
+        id: build-and-push-backend
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta-backend.outputs.tags }}
+          labels: ${{ steps.meta-backend.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          file: ./backend.dockerfile
+
+      - name: Sign the app images with GitHub OIDC Token
+        env:
+          DIGEST: ${{ steps.build-and-push-app.outputs.digest }}
+          TAGS: ${{ steps.meta-app.outputs.tags }}
+        run: |
+          images=""
+          for tag in ${TAGS}; do
+            images+="${tag}@${DIGEST} "
+          done
+          cosign sign --yes ${images}
+
+      - name: Sign the backend images with GitHub OIDC Token
+        env:
+          DIGEST: ${{ steps.build-and-push-backend.outputs.digest }}
+          TAGS: ${{ steps.meta-backend.outputs.tags }}
+        run: |
+          images=""
+          for tag in ${TAGS}; do
+            images+="${tag}@${DIGEST} "
+          done
+          cosign sign --yes ${images}
+
+      - name: Attest app
+        uses: actions/attest-build-provenance@v1
+        id: attest-app
+        with:
+          subject-name: ghcr.io/${{ env.IMAGE_NAME }}-app
+          subject-digest: ${{ steps.build-and-push-app.outputs.digest }}
+          push-to-registry: true
+
+      - name: Attest backend
+        uses: actions/attest-build-provenance@v1
+        id: attest-backend
+        with:
+          subject-name: ghcr.io/${{ env.IMAGE_NAME }}-backend
+          subject-digest: ${{ steps.build-and-push-backend.outputs.digest }}
+          push-to-registry: true