--- /dev/null
+#!/usr/bin/env node
+/*
+ * Copyright 2023 highstreet technologies and others
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/**
+ * Module dependencies.
+ */
+const app = require('../app');
+const debug = require('debug')('viewer:server');
+const http = require('http');
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+const normalizePort = (val) => {
+ const port = parseInt(val, 10);
+
+ if (isNaN(port)) {
+ // named pipe
+ return val;
+ }
+
+ if (port >= 0) {
+ // port number
+ return port;
+ }
+
+ return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+const onError = (error) => {
+ if (error.syscall !== 'listen') {
+ throw error;
+ }
+
+ const bind = typeof port === 'string'
+ ? 'Pipe ' + port
+ : 'Port ' + port;
+
+ // handle specific listen errors with friendly messages
+ switch (error.code) {
+ case 'EACCES':
+ console.error(bind + ' requires elevated privileges');
+ process.exit(1);
+ break;
+ case 'EADDRINUSE':
+ console.error(bind + ' is already in use');
+ process.exit(1);
+ break;
+ default:
+ throw error;
+ }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+const onListening = () => {
+ const addr = server.address();
+ const bind = typeof addr === 'string'
+ ? 'pipe ' + addr
+ : 'port ' + addr.port;
+ debug('Listening on ' + bind);
+}
+
+/**
+ * Get port from environment and store in Express.
+ */
+const port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+const server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);