Added GitHub workflow for publishing Docker Image to Docker Hub

.github/workflows/pub-docker-hub.yaml

@@ -0,0 +1,29 @@
+name: Publish Docker image to Docker Hub
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{secrets.DOCKER_USERNAME}}
+          password: ${{secrets.DOCKER_PASSWORD}}
+      - uses: actions/checkout@v3
+      - name: Set up Maven Central Repository
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+          server-id: docker.io
+          server-username: DOCKER_USERNAME
+          server-password: DOCKER_PASSWORD
+      - name: Publish package
+        run: mvn --batch-mode -Prelease package dockerfile:push
+env:
+  DOCKER_USERNAME: ${{secrets.DOCKER_USERNAME}}
+  DOCKER_TOKEN: ${{secrets.DOCKER_PASSWORD}}