Create ratelimiter.middleware.js

Added a middleware which returns the rate limit function, configuration change can be addressed in a single location

server/middleware/ratelimiter.middleware.js

@@ -0,0 +1,6 @@
+const rateLimit = require('express-rate-limit');
+
+const rateLimiter = ({ windowMs, max, message }) => {
+  return rateLimit({ windowMs, max, message });
+};
+module.exports = rateLimiter;