Setup Nest and React projects

server/src/app.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+describe('AppController', () => {
+  let appController: AppController;
+
+  beforeEach(async () => {
+    const app: TestingModule = await Test.createTestingModule({
+      controllers: [AppController],
+      providers: [AppService],
+    }).compile();
+
+    appController = app.get<AppController>(AppController);
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      expect(appController.health()).toBe('Healthy!');
+    });
+  });
+});

server/src/app.controller.ts

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+import { Controller, Get } from '@nestjs/common';
+import { AppService } from './app.service';
+
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get('/health')
+  health(): string {
+    return this.appService.health();
+  }
+}

server/src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+import { ServeStaticModule } from '@nestjs/serve-static';
+import { join } from 'path';
+
+@Module({
+  imports: [
+    ServeStaticModule.forRoot({
+      rootPath: join(__dirname, '../..', 'front/build'),
+    }),
+  ],
+  controllers: [],
+  providers: [],
+})
+export class AppModule {}

server/src/app.service.ts

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+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class AppService {
+  health(): string {
+    return 'Healthy!';
+  }
+}

server/src/main.ts

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+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  await app.listen(3000);
+}
+bootstrap();