Honor --public flag given to 'yarn run dev-server ...'

Author: lyrixx

lib/config/parse-runtime.js

@@ -49,9 +49,13 @@ module.exports = function(argv, cwd) {
             runtimeConfig.useHotModuleReplacement = argv.hot || false;
             runtimeConfig.devServerKeepPublicPath = argv.keepPublicPath || false;
 
-            var host = argv.host ? argv.host : 'localhost';
-            var port = argv.port ? argv.port : '8080';
-            runtimeConfig.devServerUrl = `http${runtimeConfig.devServerHttps ? 's' : ''}://${host}:${port}/`;
+            if (typeof argv.public !== 'undefined') {
+                runtimeConfig.devServerUrl = argv.public;
+            } else {
+                var host = argv.host ? argv.host : 'localhost';
+                var port = argv.port ? argv.port : '8080';
+                runtimeConfig.devServerUrl = `http${runtimeConfig.devServerHttps ? 's' : ''}://${host}:${port}/`;
+            }
 
             break;
     }