feat: add setup wizard

backend/src/app.module.ts

@@ -1,11 +1,13 @@
-import { Module } from "@nestjs/common";
+import { HttpException, HttpStatus, Module } from "@nestjs/common";
 
 import { ScheduleModule } from "@nestjs/schedule";
 import { AuthModule } from "./auth/auth.module";
 import { JobsService } from "./jobs/jobs.service";
 
 import { APP_GUARD } from "@nestjs/core";
+import { MulterModule } from "@nestjs/platform-express";
 import { ThrottlerGuard, ThrottlerModule } from "@nestjs/throttler";
+import { Request } from "express";
 import { ConfigModule } from "./config/config.module";
 import { ConfigService } from "./config/config.service";
 import { EmailModule } from "./email/email.module";
@@ -25,6 +27,24 @@ import { UserController } from "./user/user.controller";
     EmailModule,
     PrismaModule,
     ConfigModule,
+    MulterModule.registerAsync({
+      useFactory: (config: ConfigService) => ({
+        fileFilter: (req: Request, file, cb) => {
+          const maxFileSize = config.get("maxFileSize");
+          const requestFileSize = parseInt(req.headers["content-length"]);
+          const isValidFileSize = requestFileSize <= maxFileSize;
+          cb(
+            !isValidFileSize &&
+              new HttpException(
+                `File must be smaller than ${maxFileSize} bytes`,
+                HttpStatus.PAYLOAD_TOO_LARGE
+              ),
+            isValidFileSize
+          );
+        },
+      }),
+      inject: [ConfigService],
+    }),
     ThrottlerModule.forRoot({
       ttl: 60,
       limit: 100,