[dev] add github action

Author: erikglee

.github/workflows/push_to_dockerhub.yml

@@ -0,0 +1,33 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: "lab:latest"
+          driver: cloud
+          endpoint: "dcanumn/dcan-cloud-builder-1"
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          tags: dcanumn/hbcd-made:latest
+          # For pull requests, export results to the build cache.
+          # Otherwise, push to a registry.
+          outputs: ${{ github.event_name == 'pull_request' && 'type=cacheonly' || 'type=registry,push=true' }}
+