deploy documentation on github pages

.github/workflows/publish.yml

@@ -58,3 +58,31 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
+  publish_docs:
+    if: github.ref == 'refs/heads/master'
+    needs: build
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/ninanor/nina-catalogue-docs:master
+      credentials:
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      # environment created automatically by GitHub
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: "/var/www"
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2