ci: docker-imageリリース用のCIを定義

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

@@ -0,0 +1,53 @@
+name: Build and release
+on:
+  push:
+    branches:
+      - main
+
+env:
+  image_name: ghcr.io/giganticminecraft/seichiassist-downloader
+
+jobs:
+  build-image:
+    name: Build server docker image
+    runs-on: ubuntu-latest
+    outputs:
+      image_tag: ${{ steps.meta.outputs.tags }}
+    concurrency:
+      group: ${{ github.ref }}-docker-build
+      cancel-in-progress: true
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.image_name }}
+          tags: |
+            type=sha,prefix=sha-,suffix=,format=short
+
+      - name: Build
+        id: docker_build
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          context: ./server
+          file: ./Dockerfile
+          builder: ${{ steps.buildx.outputs.name }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          # すべてのビルドステージのすべてのレイヤーをキャッシュして欲しいのでmode=max
+          cache-to: type=gha,mode=max