ci: build and push docker image to ghcr

Author: avivace

.github/workflows/build-and-deploy.yml

@@ -100,3 +100,17 @@ jobs:
         git add -A
         git commit -am 'Update build'
         git push -v
+  publish-docker-image:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build and push Docker image to the GHCR
+      run: |
+             docker build . --tag ghcr.io/gbdev/pandocs:latest
+             docker push ghcr.io/gbdev/pandocs:latest