add github workflows

.github/workflows/build.yml

@@ -0,0 +1,72 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE: answerdev/answer
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.18
+
+    - name: Test
+      run: go test -v ./...
+
+    - name: Test Build
+      run: go build -v ./...
+
+    # 登录到 GitHub Packages 容器仓库
+    # 注意 secrets.GITHUB_TOKEN 不需要手动添加，直接就可以用
+    - name: Login to ghcr.io
+      uses: docker/login-action@v1
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+
+    - name: Extract metadata
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE }}
+
+    - name: Build Img
+      uses: docker/build-push-action@v3
+      with:
+        context: .
+        file: ./Dockerfile
+        builder: ${{ steps.buildx.outputs.name }}
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+
+    # - name: build to hub.docker
+    #   run: |
+    #       docker build -t answerdev/answer -f ./Dockerfile .
+    # - name: Login to hub.docker Registry
+    #   run: docker login --username=${{ secrets.DOCKER_USERNAME }} --password ${{ secrets.DOCKER_PASSWORD }}
+    # - name: Push Image to hub.docker
+    #   run: |
+    #       docker push answerdev/answer
+