fix: https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md#cache-backend-api

.github/workflows/main.yml

@@ -45,9 +45,6 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Pull old container
-        run: docker pull ghcr.io/clansty/q2tg:raincandy
-
       - name: Build and push
         uses: docker/build-push-action@v2
         with:
@@ -55,3 +52,5 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max