ci: push to multi registries

.github/workflows/docker-publish.yml

@@ -25,9 +25,21 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Login to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build and push Docker image
         uses: docker/build-push-action@v2
         with:
           context: ./base
           push: ${{ github.event_name != 'pull_request' }}
-          tags: medzik/archlinux:latest
+          tags: |
+            medzik/archlinux:latest
+            medzik/archlinux:base
+            ghcr.io/medzikuser/archlinux:latest
+            ghcr.io/medzikuser/archlinux:base