Update imageBuild.yml

.github/workflows/imageBuild.yml

@@ -1 +1,20 @@
-
+name: Build Docker Image
+on:
+  pull_request:
+    types:
+      - closed
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ghcr.io/username/repo:pr-${{ github.event.pull_request.number }}
+          labels: type=pr,event=merge
+    env:
+        DOCKER_USERNAME: ${{ secrets.DOCKER_HUB_USER }}
+        DOCKER_PASSWORD: ${{ secrets.DOCKER_HUB_PASSWORD }}