feat: add backend-mock app

apps/backend-mock/src/app.module.ts

@@ -0,0 +1,39 @@
+import configuration from '@/config/index';
+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import Joi from 'joi';
+
+import { AuthModule } from './modules/auth/auth.module';
+import { DatabaseModule } from './modules/database/database.module';
+import { HealthModule } from './modules/health/health.module';
+import { UsersModule } from './modules/users/users.module';
+
+@Module({
+  imports: [
+    TypeOrmModule.forRoot({
+      autoLoadEntities: true,
+      database: 'data/db.sqlite',
+      synchronize: true,
+      type: 'sqlite',
+    }),
+    ConfigModule.forRoot({
+      cache: true,
+      isGlobal: true,
+      load: [configuration],
+      validationOptions: {
+        abortEarly: true,
+        allowUnknown: true,
+      },
+      validationSchema: Joi.object({
+        NODE_ENV: Joi.string().valid('development', 'production', 'test'),
+        port: Joi.number(),
+      }),
+    }),
+    HealthModule,
+    AuthModule,
+    UsersModule,
+    DatabaseModule,
+  ],
+})
+export class AppModule {}