Add GitHub Actions workflow for Docker build and push

Author: arditono239

.github/workflows/docker-build.yml

@@ -0,0 +1,24 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [ "main" ]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    environment: Dev-Demo
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
+
+      - name: Build and Push Docker Image
+        run: |
+          IMAGE_NAME=${{ secrets.DOCKER_USERNAME }}/hello-world-actions
+          docker build -t $IMAGE_NAME:${{ github.sha }} .
+          docker push $IMAGE_NAME:${{ github.sha }}
+          echo "Image pushed: $IMAGE_NAME:${{ github.sha }}"