Initial deploy bundle for WebRTC signaling server and multipeer demo.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/post-receive

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+#! /usr/bin/env zsh
+
+WEB_ROOT=/var/www
+APP_DOMAIN=prag.webrtc.gallery
+
+GIT_REPO=$HOME/repos/$APP_DOMAIN.git
+TMP_GIT_CLONE=/tmp/$APP_DOMAIN
+DEPLOYED_APP=$WEB_ROOT/$APP_DOMAIN/app
+
+git clone $GIT_REPO $TMP_GIT_CLONE
+cd $TMP_GIT_CLONE
+npm install
+rm -rf $DEPLOYED_APP
+mv $TMP_GIT_CLONE $DEPLOYED_APP
+exit

scripts/start-server

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+#!/usr/bin/env node
+'use strict';
+
+const {app, io, public_dir} = require('../server');
+const debug = require('debug')(process.env.DEBUG || '');
+const fs = require('fs');
+const ifaces = require('os').networkInterfaces();
+
+/*
+  Because of proxying, it's safe to use http:// on
+  the server. No need to load up keys here.
+*/
+
+const protocol = 'http';
+const server = require(protocol).createServer(app);
+
+/**
+ *  Use the PORT environment variable or default to 3000.
+ */
+
+const port = process.env.PORT ?? '3000';
+app.set('port', port);
+
+/**
+ *  Attach socket.io to the web server.
+ */
+io.attach(server);
+
+/**
+ *  Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', handleError);
+server.on('listening', handleListening);
+
+/**
+ *  Event listener for HTTP server "error" event.
+ */
+
+function handleError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  switch (error.code) {
+  case 'EADDRINUSE':
+    console.error(`Port ${port} is already being used`);
+    process.exit(1);
+    break;
+  case 'EACCES':
+    console.error(`Port ${port} requires elevated user privileges (sudo)`);
+    process.exit(1);
+    break;
+  default:
+    throw error;
+  }
+}
+
+/**
+ *  Callback for server listen event
+ */
+
+function handleListening() {
+  const address = server.address();
+  // Inspired by https://github.com/http-party/http-server/blob/master/bin/http-server#L163
+  const interfaces = [];
+  Object.keys(ifaces).forEach(function(dev) {
+    ifaces[dev].forEach(function(details) {
+      // Node v. 18+ returns a number (4, 6) for family;
+      // earlier versions returned IPv4 or IPv6. This handles
+      // both cases.
+      if (details.family.toString().endsWith('4')) {
+        interfaces.push(`-> ${protocol}://${details.address}:${address.port}/`);
+      }
+    });
+  });
+  debug(
+    `  ** Serving from the ${public_dir}/ directory. **`
+  );
+}