login into github container reg

.github/workflows/image_build.yml

@@ -17,11 +17,12 @@ jobs:
 #        uses: docker/setup-qemu-action@v1
 #      - name: Set up Docker Buildx
 #        uses: docker/setup-buildx-action@v1
-      - name: Login to DockerHub
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@v1
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
         uses: docker/build-push-action@v2
         with: