fix some bun related issues

classes/Server.ts

@@ -36,7 +36,7 @@ export class Server {
 
   async start(port: number) {
     this.server = Bun.listen<{dataBuffer?: Buffer}>({
-      hostname: "localhost",
+      hostname: process.env.HOST!,
       port: +process.env.PORT!,
       socket: {
         data: (socket, data) => {
@@ -67,7 +67,9 @@ export class Server {
         open: (socket) => {
           socket.data = {}
         }, 
-        close(socket) {}, 
+        close: async (socket) => {
+          await this.removeUser(socket, "Disconnected");
+        }, 
         drain(socket) {}, 
         error(socket, error) {},
       },