[tsh] make default shell os dependent

app.js

@@ -1,5 +1,6 @@
 const { spawn } = require('child_process');
 const { EOL } = require('os');
+const os = require('os');
 
 const Telegraf = require('telegraf');
 const { path } = require('./util/index.js');
@@ -28,11 +29,17 @@ bot.use((ctx, next) =>
 			`Username Not authenticated!`
 		)));
 
+// get os info
+const home  = os.homedir();
+const hostname = os.hostname();
+const username = os.userInfo().username;
+const defaultShell = os.platform() === 'win32' ? 'cmd.exe' : 'bash';
+
 bot.command('start',
 	ctx => {
-		ctx.replyWithHTML('Welcome to tsh -- <code>Telegram Shell!</code>');
-		const newProc = spawn('bash', {
-			cwd: '/home'
+		ctx.replyWithHTML(`Welcome to tsh -- <code>Telegram Shell!</code><br><br>You are now connected to <code>${hostname}</code> as <strong>${username}</strong>`);
+		const newProc = spawn(defaultShell, {
+			cwd: home
 		});
 		newProc.stdout.setEncoding('utf8');
 		sessions.push(newProc);