Bind WebGL server to all interfaces

Build/server.js

@@ -3,6 +3,7 @@ const fs = require('fs');
 const path = require('path');
 
 const PORT = process.env.PORT || 24710;
+const HOST = process.env.HOST || '0.0.0.0';
 const ROOT = __dirname;
 
 const MIME = {
@@ -150,12 +151,12 @@ function serveStatic(req, res) {
 http.createServer((req, res) => {
   if (req.url === '/' || req.url === '/index.html') return serveIndex(res);
   serveStatic(req, res);
-}).listen(PORT, () => {
+}).listen(PORT, HOST, () => {
   console.log('');
   console.log('  ╔══════════════════════════════════════════════════╗');
   console.log('  ║  运动伤害现场急救虚拟仿真实验 - WebGL Server       ║');
   console.log('  ║                                                  ║');
-  console.log('  ║  Server running at: http://localhost:' + PORT + '          ║');
+  console.log('  ║  Server running at: http://' + HOST + ':' + PORT + '          ║');
   console.log('  ║  Press Ctrl+C to stop                            ║');
   console.log('  ╚══════════════════════════════════════════════════╝');
   console.log('');