delete unused js file, add env example explain

-SOCKET_PORT=
-TWITCH_TOKEN=
-PAPAGO_ID=
-PAPAGO_SECRET=
-BOT_USERNAME= 
-OAUTH_TOKEN=
+
+HOST_URI = [twitch end point url]
+SOCKET_PORT= [backend socket server port]
+TWITCH_CLIENT= [twitch dev client id]
+TWITCH_SECRET= [twitch dev client id secret]
+PAPAGO_ID= [papago client id]
+PAPAGO_SECRET= [papago client secret]
+BOT_USERNAME= [twitch bot name]
+OAUTH_TOKEN= [twitch user oauth token]

-// const tmi = require('tmi.js');
-// const papago = require('./openAPIs/papago_api')
-// const ttlserver = require('../socket_server')
-
-// // Define configuration options
-// var opts = {
-//   identity: {
-//     username: process.env.BOT_USERNAME,
-//     password: process.env.OAUTH_TOKEN
-//   },
-//   channels: [
-//     'bachelorchuckchuck'
-//   ]
-// };
-
-// // Create a client with our options
-// const client = new tmi.client(opts);
-
-// // Register our event handlers (defined below)
-// client.on('message', onMessageHandler);
-// client.on('connected', onConnectedHandler);
-
-// // Connect to Twitch:
-// client.connect();
-
-// // Called every time a message comes in
-// function onMessageHandler (target, context, msg, self) {
-//   if (self) { return; } // Ignore messages from the bot
-  
-//   client.say(target, `/color `+changecolor());
-//   papago.detectchat(msg, client, target);
-
-//   if(msg == '척척학사'){
-//     client.say(target, `안녕하세요 척척학사의 방송입니다.`);
-//   }
-  
-// }
-
-// exports.addChannel = (channel) =>{
-//     opts.channels.append(channel);
-// }
-
-// // Called every time the bot connects to Twitch chat
-// function onConnectedHandler (addr, port) {
-//   console.log(`* Connected to ${addr}:${port}`);
-// }