message: docs: add notice
diff: @@ -111,3 +111,12 @@ Supported strategy:
  - `deepmerge`, default strategy, it will deepmerge to default config.
  - `merge`, it will merge to default config, equal to `Object.assign`.
  - `replace`, it will replace current config.
  +
  +## Notice
  +
  +Before you get or set config, you should import platform package at first.
  +
  +```ts
  +import '@fower/react'
  +import { getConfig, setConfig } from '@fower/core'
  +```
  