first commit

apps/backend/src/app.ts

@@ -0,0 +1,51 @@
+import cors from 'cors';
+import express from 'express';
+import helmet from 'helmet';
+import pinoHttp from 'pino-http';
+import rateLimit from 'express-rate-limit';
+import { router } from './routes/index.js';
+import { notFoundHandler } from './middlewares/not-found.js';
+import { errorHandler } from './middlewares/error-handler.js';
+import { logger } from './config/logger.js';
+
+export function createApp() {
+  const app = express();
+
+  app.use(helmet());
+  app.use(
+    cors({
+      origin: '*',
+      credentials: true
+    })
+  );
+  app.use(express.json({ limit: '10mb' }));
+  app.use(express.urlencoded({ extended: true }));
+  app.use(
+    rateLimit({
+      windowMs: 60_000,
+      limit: 100,
+      legacyHeaders: false
+    })
+  );
+  app.use(
+    pinoHttp({
+      logger,
+      autoLogging: false
+    })
+  );
+
+  app.get('/', (_req, res) => {
+    res.json({
+      name: 'AI Bill API',
+      version: '0.1.0',
+      uptime: process.uptime()
+    });
+  });
+
+  app.use('/api', router);
+
+  app.use(notFoundHandler);
+  app.use(errorHandler);
+
+  return app;
+}