chore: doc issue (#1062)

api/README.md

@@ -54,9 +54,11 @@
 7. Setup your application by visiting http://localhost:5001/console/api/setup or other apis...
 8. If you need to debug local async processing, you can run `celery -A app.celery worker -Q dataset,generation,mail`, celery can do dataset importing and other async tasks.
 
-8. Start frontend:
+8. Start frontend
+
+   You can start the frontend by running `npm install && npm run dev` in web/ folder, or you can use docker to start the frontend, for example:
 
    ```
-   docker run -it -d --platform linux/amd64 -p 3000:3000 -e EDITION=SELF_HOSTED -e CONSOLE_URL=http://127.0.0.1:5000 --name web-self-hosted langgenius/dify-web:latest
+   docker run -it -d --platform linux/amd64 -p 3000:3000 -e EDITION=SELF_HOSTED -e CONSOLE_URL=http://127.0.0.1:5001 --name web-self-hosted langgenius/dify-web:latest
    ```
    This will start a dify frontend, now you are all set, happy coding!
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