updated BE file naming convention

backend/middleware/utils/middleware-utils.ts

@@ -0,0 +1,15 @@
+import { NextFunction } from "express";
+import { validationResult } from "express-validator";
+import { Request, Response } from "express";
+
+export const middlewareValidationFunction = (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  const errors = validationResult(req);
+  if (!errors.isEmpty()) {
+    return res.status(400).json({ errors: errors.array() });
+  }
+  next();
+};