Add config file

backend-services/friend-service/config.ts

+export default {
+    JWT_SECRET: ""
+}

backend-services/friend-service/src/Middleware/Auth.ts

 import jwt, { Secret, JwtPayload } from 'jsonwebtoken';
 import { Request, Response, NextFunction } from 'express';
+import Config from '../../config'
 
-export const SECRET_KEY: Secret = 'abcdefg12345';
+export const SECRET_KEY: Secret = Config.JWT_SECRET;
 
 export interface CustomJWTRequest extends Request {
  token?: string | JwtPayload;