Refactor code structure for improved readability and maintainability

package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "cors": "^2.8.5",
-    "dotenv": "^16.4.5",
+    "dotenv": "^16.6.1",
     "express": "^4.19.2",
     "helmet": "^7.1.0",
     "jsonwebtoken": "^9.0.2",

src/index.js

@@ -1,7 +1,4 @@
 import dotenv from 'dotenv';
-import fs from 'fs';
-import path from 'path';
-import { fileURLToPath } from 'url';
 import express from 'express';
 import http from 'http';
 import cors from 'cors';
@@ -13,33 +10,8 @@ import lobbyRoutes from './routes/lobby.js';
 import walletRoutes from './routes/wallet.js';
 import pool from './db.js';
 import { setupWebSocket } from './ws.js';
-
-const __dirname = path.dirname(fileURLToPath(import.meta.url));
-const envCandidates = [
-  path.join(process.cwd(), '.env'),
-  path.join(__dirname, '..', '.env'),
-  path.join(__dirname, '..', '..', '.env')
-];
-
-let envLoaded = false;
-for (const candidate of envCandidates) {
-  if (fs.existsSync(candidate)) {
-    dotenv.config({ path: candidate });
-    envLoaded = true;
-    break;
-  }
-}
-
-if (!envLoaded) {
-  // eslint-disable-next-line no-console
-  console.warn('Figyelem: .env fajl nem talalhato, ENV valtozok nelkul indul.');
-}
-
-if (!process.env.DB_HOST) {
-  // eslint-disable-next-line no-console
-  console.error('Hiba: DB_HOST nincs beallitva. Ellenorizd az .env fajlt vagy az ENV valtozokat.');
-  process.exit(1);
-}
+import dotenv from 'dotenv';
+dotenv.config();
 
 const app = express();