chore: size-check

packages/size-check/env.ts

+import path from 'path'
+process.env.UNI_CLI_CONTEXT = __dirname
+process.env.UNI_INPUT_DIR = path.resolve(__dirname, 'src')
+process.env.UNI_OUTPUT_DIR = path.resolve(__dirname, 'dist')
+process.env.UNI_PLATFORM = 'h5'

packages/size-check/vite.config.ts

 import path from 'path'
 import { terser } from 'rollup-plugin-terser'
+import './env'
 import uniH5VitePlugins from '@dcloudio/uni-h5-vite'
 import uni from '@dcloudio/vite-plugin-uni'
 import { UserConfig } from 'vite'
 
-process.env.UNI_CLI_CONTEXT = __dirname
-process.env.UNI_INPUT_DIR = path.resolve(__dirname, 'src')
-process.env.UNI_OUTPUT_DIR = path.resolve(__dirname, 'dist')
-process.env.UNI_PLATFORM = 'h5'
-
 export default {
   root: __dirname,
   logLevel: 'info',