Build image on push

.github/workflows/build-citus.yml

@@ -0,0 +1,38 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [citus]
+  pull_request:
+    branches: [citus]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository_owner }}/pgvector-citus
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile.citus
+          push: true
+          tags: |
+            ghcr.io/${{ github.repository_owner }}/pgvector-citus:latest
+            ghcr.io/${{ github.repository_owner }}/pgvector-citus:${{ github.sha }}