feat: scaffold NestJS backend with Swagger, validation, CORS

apps/backend/nest-cli.json

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+{
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src"
+}

apps/backend/package.json

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+{
+  "name": "@moex-vibe/backend",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "build": "nest build",
+    "start:dev": "nest start --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,test}/**/*.ts\"",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@nestjs/common": "^10.0.0",
+    "@nestjs/core": "^10.0.0",
+    "@nestjs/platform-express": "^10.0.0",
+    "@nestjs/config": "^3.0.0",
+    "@nestjs/swagger": "^7.0.0",
+    "@nestjs/axios": "^3.0.0",
+    "@nestjs/cache-manager": "^2.0.0",
+    "cache-manager": "^5.0.0",
+    "axios": "^1.6.0",
+    "reflect-metadata": "^0.1.13",
+    "rxjs": "^7.8.0",
+    "class-validator": "^0.14.0",
+    "class-transformer": "^0.5.0",
+    "p-queue": "^7.3.0",
+    "swagger-ui-express": "^5.0.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^10.0.0",
+    "@nestjs/schematics": "^10.0.0",
+    "@nestjs/testing": "^10.0.0",
+    "@types/express": "^4.17.0",
+    "@types/node": "^20.0.0",
+    "typescript": "^5.3.0",
+    "vitest": "^1.0.0",
+    "eslint": "^8.0.0",
+    "@typescript-eslint/eslint-plugin": "^7.0.0",
+    "@typescript-eslint/parser": "^7.0.0"
+  }
+}

apps/backend/src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { CacheModule } from './modules/cache/cache.module';
+import { MoexClientModule } from './modules/moex-client/moex-client.module';
+import { HealthModule } from './modules/health/health.module';
+import { SecuritiesModule } from './modules/securities/securities.module';
+import { SharesModule } from './modules/shares/shares.module';
+import { BondsModule } from './modules/bonds/bonds.module';
+import { CandlesModule } from './modules/candles/candles.module';
+import configuration from './config/configuration';
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({ load: [configuration], isGlobal: true }),
+    CacheModule,
+    MoexClientModule,
+    HealthModule,
+    SecuritiesModule,
+    SharesModule,
+    BondsModule,
+    CandlesModule,
+  ],
+})
+export class AppModule {}

apps/backend/src/main.ts

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+import 'reflect-metadata';
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
+import { HttpExceptionFilter } from './common/filters/http-exception.filter';
+import { TransformInterceptor } from './common/interceptors/transform.interceptor';
+import { RequestLoggingMiddleware } from './common/middleware/request-logging.middleware';
+import { ValidationPipe } from '@nestjs/common';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+
+  app.setGlobalPrefix('api/v1');
+
+  app.useGlobalPipes(new ValidationPipe({ transform: true, whitelist: true }));
+  app.useGlobalFilters(new HttpExceptionFilter());
+  app.useGlobalInterceptors(new TransformInterceptor());
+  app.use(new RequestLoggingMiddleware().use);
+
+  app.enableCors();
+
+  const config = new DocumentBuilder()
+    .setTitle('MoexVibe API')
+    .setVersion('1.0.0')
+    .build();
+  const document = SwaggerModule.createDocument(app, config);
+  SwaggerModule.setup('api/docs', app, document);
+
+  const port = process.env.PORT || 3000;
+  await app.listen(port);
+  console.log(`MoexVibe API running on http://localhost:${port}/api/v1`);
+  console.log(`Swagger docs: http://localhost:${port}/api/docs`);
+}
+bootstrap();

apps/backend/tsconfig.json

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+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "commonjs",
+    "outDir": "./dist",
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "baseUrl": "./",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*"]
+}