fix: serve /api/fonts with correct Content-Type in production

- Add specific location block for /api/fonts endpoint
- Set default_type to application/json for API routes
- Next.js static export creates extensionless files that need explicit Content-Type
- Fixes 404 error on production deployment

nginx.conf

@@ -37,9 +37,15 @@ http {
     add_header X-XSS-Protection "1; mode=block" always;
     add_header Referrer-Policy "no-referrer-when-downgrade" always;
 
-    # API routes - serve as JSON
+    # API routes - serve as JSON (Next.js static export creates files without extensions)
+    location /api/fonts {
+      default_type application/json;
+      add_header Cache-Control "public, max-age=3600";
+      try_files /api/fonts =404;
+    }
+
     location ~ ^/api/ {
-      add_header Content-Type application/json;
+      default_type application/json;
       add_header Cache-Control "public, max-age=3600";
       try_files $uri =404;
     }