add ci

.github/workflows/go.yml

@@ -0,0 +1,32 @@
+name: build
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+
+  build_and_deploy_docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Login to image repository
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: ghcr.io/simon-ding/polaris:latest
+
+    # - name: Set up Go
+    #   uses: actions/setup-go@v3
+    #   with:
+    #     go-version: '>=1.20.0'
+
+    # - name: Build
+    #   run: go build -v ./...