doc: more detailed frontend debug comment

docs/en/develop/dev-config.md

@@ -44,8 +44,14 @@ Install dependencies and start the frontend
 ```bash
 pnpm install
 pnpm dev
+
+# If pnpm is not installed, you can also use npm to solve dependencies and start
+npm install
+npm run dev
 ```
 
+Then according to the output information, visit `http://127.0.0.1:3000` to view the standalone frontend page.
+
 :::info
 When using `pnpm dev` to start locally, the environment variable `NEXT_PUBLIC_API_BASE_URL` will be automatically used by the frontend to ensure that the frontend can access the `5300` port of the locally running backend.
 

docs/zh/develop/dev-config.md

@@ -44,8 +44,14 @@ copy .env.example .env
 ```bash
 pnpm install
 pnpm dev
+
+# 若未安装pnpm，也可以使用npm来解决依赖并启动
+npm install
+npm run dev
 ```
 
+然后根据输出信息，访问`http://127.0.0.1:3000`查看独立启动的前端页面。
+
 :::info
 本地使用`pnpm dev`启动时，会携带`.env`中的环境变量`NEXT_PUBLIC_API_BASE_URL`，该变量会自动被前端使用，以确保前端可以访问到本地启动的后端的`5300`端口。