Addes ping method

backend/src/app.module.ts

@@ -2,6 +2,7 @@ import { Module } from '@nestjs/common';
 import { TypeOrmModule, TypeOrmModuleOptions } from '@nestjs/typeorm';
 import { config } from 'config';
 import { LibsModule } from 'libs/libs.module';
+import { AppController } from './app.controller';
 import { AdminModule } from './modules/admin/admin.module';
 import { ImageModule } from './modules/image/image.module';
 import { AppInitService } from './modules/initialization/app.init.service';
@@ -19,7 +20,7 @@ import { UserModule } from './modules/user/user.module';
         ProxyModule,
         TypeOrmModule.forRoot(<TypeOrmModuleOptions>config.database),
     ],
-    controllers: [],
+    controllers: [AppController],
     providers: [AppInitService],
 })
 export class AppModule {}