📝 Update usage about docker

Author: OpenWaygate

README.md

@@ -84,6 +84,8 @@ There are two actions available for yutu, one is for general purpose and the oth
 ```shell
 ❯ docker pull ghcr.io/eat-pray-ai/yutu:latest
 ❯ docker run --rm ghcr.io/eat-pray-ai/yutu:latest
+# make sure client_secret.json is in the current directory
+❯ docker run --rm -it -u $(id -u):$(id -g) -v $(pwd):/app ghcr.io/eat-pray-ai/yutu:latest auth
 ```
 
 ### Gopher