fixed undefined app port

docker-compose.yaml

@@ -34,6 +34,5 @@ services:
       interval: 10s
       timeout: 5s
       retries: 5
-
 volumes:
   db-data:

index.js

@@ -1,3 +1,4 @@
+require('dotenv').config();
 const express = require('express');
 const session = require('express-session');
 const port = process.env.APP_PORT;
@@ -15,7 +16,7 @@ const server = createServer(app);
 const jwt = require('jsonwebtoken');
 const jwtSecret = process.env.JWT_SECRET;
 
-require('dotenv').config();
+
 app.use(cookieParser());
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));