use ghcr instead

.github/workflows/docker-publish.yml

@@ -8,15 +8,16 @@ on:
     branches: [ "main", "master" ]
 
 env:
-  REGISTRY: docker.io
-  IMAGE_NAME: ck98/ck98-dockul
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
   build:
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
+      id-token: write
 
     steps:
       - name: Checkout repository
@@ -28,12 +29,13 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Log in to Docker Hub
+      - name: Log in to GitHub Container Registry
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta