feat: add rate limiting

backend/src/main.ts

@@ -1,12 +1,16 @@
 import { ClassSerializerInterceptor, ValidationPipe } from "@nestjs/common";
 import { NestFactory, Reflector } from "@nestjs/core";
+import { NestExpressApplication } from "@nestjs/platform-express";
 import * as fs from "fs";
 import { AppModule } from "./app.module";
+
 async function bootstrap() {
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create<NestExpressApplication>(AppModule);
   app.useGlobalPipes(new ValidationPipe());
   app.useGlobalInterceptors(new ClassSerializerInterceptor(app.get(Reflector)));
 
+  app.set("trust proxy", true);
+
   await fs.promises.mkdir("./data/uploads/_temp", { recursive: true });
 
   app.setGlobalPrefix("api");