Small CI for openapi2jsonschema, publish docker image

.github/workflows/openapi2jsonschema.yml

@@ -19,6 +19,7 @@ jobs:
         working-directory: ./scripts
         run: make docker-test docker-acceptance
 
+      # https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
       - name: Log in to the Container registry
         uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
@@ -26,6 +27,12 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
       - name: Build and push Docker image
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with: