add GitHub Actions workflow and Dockerfile for building and pushing container image

.github/workflows/build.yaml

@@ -0,0 +1,41 @@
+name: Build and Push Container Image
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: docker-build
+  cancel-in-progress: false
+
+env:
+  CONTAINER_TAG: liteyuki/new-domain-redir:latest
+  REGISTRY: reg.liteyuki.org
+
+jobs:
+  build-and-push-and-deploy:
+    runs-on: liteyukios-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Log in to Liteyuki Harbor
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.LCR_USERNAME }}
+          password: ${{ secrets.LCR_PASSWORD }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build and push container image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.CONTAINER_TAG }}