Add ip setting (#582)

* Add support for an IP address setting

* Provide default IP, update docs

README.md

@@ -313,6 +313,7 @@ If you want to change default settings, you can create a settings.json file and
 Available options are:
 
 * port: change the listening port
+* ip: change the listening IP
 * https: use https which requires a key and certificate or pfx file
 * auth: require basic auth credentials which requires a username and password
 * announceVolume: the percentual volume use when invoking say/sayall without any volume parameter
@@ -328,6 +329,7 @@ Example:
 	    "name": "ZiraRUS"
 	  },
 	  "port": 5005,
+	  "ip": "0.0.0.0",
 	  "securePort": 5006,
 	  "https": {
 	    "key": "/path/to/key.pem",

server.js

@@ -80,8 +80,9 @@ process.on('unhandledRejection', (err) => {
   logger.error(err);
 });
 
-server.listen(settings.port, function () {
-  logger.info('http server listening on port', settings.port);
+let host = settings.ip;
+server.listen(settings.port, host, function () {
+  logger.info('http server listening on', host, 'port', settings.port);
 });
 
 server.on('error', (err) => {

settings.js

@@ -16,6 +16,7 @@ function merge(target, source) {
 
 var settings = {
   port: 5005,
+  ip: "0.0.0.0",
   securePort: 5006,
   cacheDir: path.resolve(__dirname, 'cache'),
   webroot: path.resolve(__dirname, 'static'),