ci: Add Docker image publishing on ghcr

Author: pikhovkin

.github/workflows/publish.yaml

@@ -5,7 +5,7 @@ on:
     types: [created]
 
 jobs:
-  build-and-publish:
+  build-and-publish-on-pypi:
     if: github.event_name == 'release' && github.event.action == 'created'
     runs-on: ubuntu-latest
     steps:
@@ -23,3 +23,21 @@ jobs:
     - name: Publish package
       run : |
         hatch publish -u __token__ -a ${{ secrets.PYPI_API_TOKEN }}
+
+  build-and-publish-on-ghcr:
+    if: github.event_name == 'release' && github.event.action == 'created'
+    runs-on: ubuntu-latest
+    env:
+      DJANGO_SETTINGS_MODULE: tests.conf.settings.demo
+      GHCR_IMAGE_NAME: "ghcr.io/pikhovkin/${GITHUB_REPOSITORY:10}"
+      TAG: ${GITHUB_REF:10}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Docker login
+        run: echo ${{ secrets.GHCR_TOKEN }} | docker login ghcr.io -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
+      - name: Build the Docker image
+        run: |
+          docker build -f docker/Dockerfile -t ${{ env.GHCR_IMAGE_NAME }}-demo:${{ env.TAG }} .
+      - name: Docker push
+        run: |
+          docker push ${{ env.GHCR_IMAGE_NAME }}-demo:${{ env.TAG }}