feat: support custom environment file path via CUSTOM_ENV_PATH variable

src/config/env.ts

@@ -1,6 +1,9 @@
 import { config } from 'dotenv';
 import { hostname } from 'os';
-config();
+
+declare const CUSTOM_ENV_PATH: string;
+const envPath = typeof CUSTOM_ENV_PATH !== 'undefined' ? CUSTOM_ENV_PATH : './.env';
+config({ path: envPath });
 
 const generateInstanceId = () => {
   return process.env.INSTANCE_ID || hostname() || `kord-${Math.random().toString(36).substring(2, 7)}`;