Build and push Docker image in GitHub Actions

.github/workflows/docker.yaml

@@ -0,0 +1,73 @@
+name: Docker
+
+on:
+  push:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    name: Build and push Docker image
+    runs-on: ubuntu-latest
+    env:
+      IMAGE: ghcr.io/${{ github.repository }}
+
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: "${{ env.IMAGE }}"
+          bake-target: docker-metadata-action
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          config-inline: |
+            [registry."docker.io"]
+              mirrors = ["mirror.gcr.io"]
+
+      - name: Login to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build
+        uses: docker/build-push-action@v2
+        if: github.event_name == 'pull_request'
+        with:
+          platforms: |
+            linux/amd64
+            linux/arm64
+            linux/arm
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ env.IMAGE }}:buildcache
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        if: github.event_name != 'pull_request'
+        with:
+          platforms: |
+            linux/amd64
+            linux/arm64
+            linux/arm
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          push: true
+          cache-from: type=registry,ref=${{ env.IMAGE }}:buildcache
+          cache-to: type=registry,ref=${{ env.IMAGE }}:buildcache,mode=max