Fix env bug (#11)

src/channel/channel.gateway.ts

@@ -10,7 +10,9 @@ import { MikroORM, UseRequestContext } from '@mikro-orm/core';
 import { Server, Socket } from 'socket.io';
 import { ChannelService } from './channel.service';
 import { Channel } from './channel';
-import * as process from 'process';
+import * as dotenv from 'dotenv';
+
+dotenv.config();
 
 const WEB_SOCKET_OPTIONS =
   process.env.NODE_ENV === 'production'