Improve docker images

.github/workflows/docker.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Gather image information
         id: info
         run: |
-          DOCKER_IMAGE=ghcr.io/drakkan/sftpgo
+          DOCKER_IMAGE=drakkan/sftpgo
           VERSION=noop
           DOCKERFILE=Dockerfile
           if [ "${{ github.event_name }}" = "schedule" ]; then
@@ -75,12 +75,11 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
-      - name: Login to GitHub Container Registry
+      - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.CR_PAT }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
         if: github.event_name != 'pull_request'
 
       - name: Build and push