use github container registry

.github/workflows/docker-ci.yml

@@ -5,9 +5,18 @@ on:
     tags:
       - 'v*.*.*'
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
-  docker:
+  build-and-push-image:
     runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
     steps:
       -
         name: Checkout
@@ -30,7 +39,7 @@ jobs:
         with:
           # list of Docker images to use as base name for tags
           images: |
-            ${{ secrets.DOCKERHUB_USERNAME }}/${{ github.event.repository.name }}
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           # generate Docker tags based on the following events/attributes
           tags: |
             type=semver,pattern={{version}}
@@ -47,8 +56,9 @@ jobs:
         name: Login to DockerHub
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       -
         name: Build and push
         id: docker_build