Added workflow to publish image to dockerhub

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+name: publish
+
+on:
+  push:
+    branches: 
+      - main
+      - '**'
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - uses: azure/docker-login@v1
+      with:
+        username: ${{ secrets.DOCKER_EDU_HUB_REGISTRY_USERNAME }}
+        password: ${{ secrets.DOCKER_EDU_HUB_REGISTRY_PASSWORD }}
+    - uses: rlespinasse/[email protected]
+    - name: Build Docker image
+      run: docker build --tag ${{ github.repository }}:${{ env.GITHUB_REF_SLUG }} .
+    - name: Publish to DockerHub
+      run: docker push ${{ github.repository }}:${{ env.GITHUB_REF_SLUG }}