fix: Ensure that the commands are executed in the correct directory s… (#5089)

…o that all services (including the es and infinity containers) can be
started correctly, and resolve the Failed to resolve 'es01' #4875

### What problem does this PR solve?

https://github.com/infiniflow/ragflow/issues/4875

### Type of change

- [x] Documentation Update

docs/quickstart.mdx

@@ -178,7 +178,7 @@ This section provides instructions on setting up the RAGFlow server on Linux. If
 
    ```bash
    $ git clone https://github.com/infiniflow/ragflow.git
-   $ cd ragflow
+   $ cd ragflow/docker
    $ git checkout -f v0.16.0
    ```
 
@@ -189,7 +189,7 @@ This section provides instructions on setting up the RAGFlow server on Linux. If
    :::
 
    ```bash
-   $ docker compose -f docker/docker-compose.yml up -d
+   $ docker compose -f docker-compose.yml up -d
    ```
 
 ```mdx-code-block