chore: Struct adjust

src/main/index.ts

@@ -1,11 +1,10 @@
 /**
  * electron 主文件
  */
+require('dotenv').config({ path: join(__dirname, '../../.env') })
+
 import { join } from 'path'
 import { app, BrowserWindow } from 'electron'
-import dotenv from 'dotenv'
-
-dotenv.config({ path: join(__dirname, '../../.env') })
 
 let win: BrowserWindow