添加 GitHub Actions 工作流以构建和推送 Docker 镜像

此更改引入了一个新的工作流文件 `docker-build.yml`，用于在推送和拉取请求时自动构建和推送 Docker 镜像。工作流包括前端构建、上传工件、登录容器注册表以及提取元数据等步骤，旨在简化 CI/CD 流程并提高构建效率。

.github/workflows/docker-build.yml

@@ -0,0 +1,93 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Apply frontend patch
+        run: |
+          cd excalidraw
+          git apply ../frontend.patch
+
+      - name: Build frontend
+        run: |
+          docker build -t excalidraw-ui-build excalidraw -f ui-build.Dockerfile
+          docker run -v ${PWD}/:/pwd/ excalidraw-ui-build cp -r /frontend /pwd
+
+      - name: Upload frontend artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: frontend
+          path: frontend/
+
+  build-and-push:
+    needs: build-frontend
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Download frontend artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: frontend
+          path: frontend/
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./excalidraw-complete.Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }},latest
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.OWNER }}/${{ env.IMAGE_NAME }}:buildcache
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.OWNER }}/${{ env.IMAGE_NAME }}:buildcache,mode=max