test v1 of docker image workflow

Author: RoguedBear

.github/workflows/publish-image.yml

@@ -0,0 +1,35 @@
+name: Build and publish Docker image to ghcr.io
+on:
+  # publish on releases, e.g. v2.1.13 (image tagged as "2.1.13" - "v" prefix is removed)
+  release:
+    types: [published]
+
+  # publish on pushes to the main branch (image tagged as "latest")
+  push:
+    branches:
+      - main
+      - master
+#    paths:
+#      - "urNode-backend/**"
+  # allow manual triggers
+  workflow_dispatch:
+
+jobs:
+  docker_publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      # https://github.community/t/github-actions-repository-name-must-be-lowercase/184924
+      - name: downcase REPO
+        run: |
+          echo "REPO_LC=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}
+      # https://github.com/marketplace/actions/push-to-ghcr
+      - name: Build and publish a Docker image for ${{ github.repository }}
+        uses: macbre/push-to-ghcr@master
+        with:
+          image_name: ${REPO_LC}-backend
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          # optionally push to the Docker Hub (docker.io)
+          # docker_io_token: ${{ secrets.DOCKER_IO_ACCESS_TOKEN }}  # see https://hub.docker.com/settings/security