MOD: migrate, change some dependencies, changed regexp for subdomains

bin/server

@@ -1,42 +1,37 @@
-#!/usr/bin/env node -r esm
+#!/usr/bin/env node
+require('localenv');
+const yargs = require('yargs');
+const log = require('book');
+const Debug = require('debug');
 
-import 'localenv';
-import optimist from 'optimist';
-
-import log from 'book';
-import Debug from 'debug';
-
-import CreateServer from '../server';
+const CreateServer = require('../server');
 
 const debug = Debug('localtunnel');
 
-const argv = optimist
+const { argv } = yargs
     .usage('Usage: $0 --port [num]')
-    .options('secure', {
-        default: false,
+    .env(true)
+    .option('secure', {
         describe: 'use this flag to indicate proxy over https'
     })
-    .options('port', {
+    .option('port', {
         default: '80',
         describe: 'listen on this port for outside requests'
     })
-    .options('address', {
+    .option('address', {
         default: '0.0.0.0',
         describe: 'IP address to bind to'
     })
-    .options('domain', {
+    .option('domain', {
         describe: 'Specify the base domain name. This is optional if hosting localtunnel from a regular example.com domain. This is required if hosting a localtunnel server from a subdomain (i.e. lt.example.dom where clients will be client-app.lt.example.come)',
     })
-    .options('max-sockets', {
+    .option('max-sockets', {
         default: 10,
         describe: 'maximum number of tcp sockets each client is allowed to establish at one time (the tunnels)'
     })
-    .argv;
-
-if (argv.help) {
-    optimist.showHelp();
-    process.exit();
-}
+    .help('help', 'Show this help and exit')
+    .boolean('secure')
+    .require('port');
 
 const server = CreateServer({
     max_tcp_sockets: argv['max-sockets'],
@@ -63,6 +58,3 @@ process.on('uncaughtException', (err) => {
 process.on('unhandledRejection', (reason, promise) => {
     log.error(reason);
 });
-
-// vim: ft=javascript
-