Supplement front-end compilation documentation

[Jzow]

When initializing the project for the first time, it is necessary to use pnpm, but when installing pnpm using npm, an error will be reported.

npm ERR! code EUNSUPPORTEDPROTOCOL
npm ERR! Unsupported URL Type "workspace:": workspace:*

npm ERR! A complete log of this run can be found in: C:\Users\James Zow\AppData\Local\npm-cache\_logs\2024-03-12T14_42_53_110Z-debug-0.log

[Jzow]

add npm install -g pnpm

[Jzow]

Added