FIX: convert env variable PORT to a number.

(close #1099)

Author: LinusBorg

template/build/webpack.dev.conf.js

@@ -8,6 +8,9 @@ const HtmlWebpackPlugin = require('html-webpack-plugin')
 const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
 const portfinder = require('portfinder')
 
+const HOST = process.env.HOST
+const PORT = process.env.PORT && Number(process.env.PORT)
+
 const devWebpackConfig = merge(baseWebpackConfig, {
   module: {
     rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
@@ -21,8 +24,8 @@ const devWebpackConfig = merge(baseWebpackConfig, {
     historyApiFallback: true,
     hot: true,
     compress: true,
-    host: process.env.HOST || config.dev.host,
-    port: process.env.PORT || config.dev.port,
+    host: HOST || config.dev.host,
+    port: PORT || config.dev.port,
     open: config.dev.autoOpenBrowser,
     overlay: config.dev.errorOverlay
       ? { warnings: false, errors: true }