Set dynamically aboslute public path on 'npm run watch'; fix http/htt… (#1696)

* Set dynamically aboslute public path on 'npm run watch'; fix http/https hardcoded in watch.js

* WEBPACK_PUBLIC_PATH fix

watch.js

@@ -9,15 +9,9 @@ var webpackConfig = require('./webpack.config'),
     config = require('./assets/config');
 
 // Internal variables
-var host = 'http://localhost',
-    port = config.devPort || '3000',
-    compiler;
-
-webpackConfig.output.publicPath = host + ':' + port + config.output.publicPath;
-compiler = webpack(webpackConfig);
+var compiler = webpack(webpackConfig);
 
 browserSync.init({
-  port: port,
   proxy: {
     target: config.devUrl,
     middleware: [