增加数据库配置

src/app.module.ts

@@ -1,9 +1,21 @@
 import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
+import { TypeOrmModule } from '@nestjs/typeorm';
 
 @Module({
-  imports: [],
+  imports: [
+    TypeOrmModule.forRoot({
+      type: 'mysql',
+      host: 'localhost',
+      port: 3306,
+      username: 'root',
+      password: 'jeremy',
+      database: 'nest',
+      synchronize: true,
+      entities: [__dirname + '/**/*.entity{.ts,.js}'],
+    }),
+  ],
   controllers: [AppController],
   providers: [AppService],
 })