Add docker image build and push workflow (#118)

Signed-off-by: Angelica Ochoa <15623749+ao508@users.noreply.github.com>

Author: ao508

.github/workflows/docker-image.yml

@@ -0,0 +1,20 @@
+name: Build and Publish image to Docker Hub
+
+on:
+  push:
+    tags:
+      - "*.RELEASE"
+
+jobs:
+  publish_images:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v4
+    - name: build image
+      run: docker build . --file Dockerfile --tag cmometadb/label-generator:${{ github.ref_name }}
+    - name: push image
+      run: |
+        docker login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }}
+        docker push cmometadb/label-generator:${{ github.ref_name }}
+