fix: Increase request body size limit to 10MB for base64 image uploads

Added express body parser configuration to support base64 image uploads:
- Set JSON payload limit to 10MB (up from default 100kb)
- Set URL-encoded payload limit to 10MB
- This allows users to upload profile photos and child photos via base64 encoding

Without this fix, uploading photos would result in 500 Internal Server Error due to payload too large.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-app/maternal-app-backend/src/main.ts

@@ -5,7 +5,14 @@ import helmet from 'helmet';
 import { WINSTON_MODULE_NEST_PROVIDER } from 'nest-winston';
 
 async function bootstrap() {
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create(AppModule, {
+    bodyParser: true,
+    rawBody: true,
+  });
+
+  // Increase body size limit for base64 image uploads (10MB)
+  app.use(require('express').json({ limit: '10mb' }));
+  app.use(require('express').urlencoded({ limit: '10mb', extended: true }));
 
   // Replace default logger with Winston
   app.useLogger(app.get(WINSTON_MODULE_NEST_PROVIDER));