devServer: add proxy, consistent spaces

Author: simon04

content/configuration/index.md

@@ -369,12 +369,15 @@ module.exports = {
   // lets you precisely control what bundle information gets displayed
 
   [devServer](/configuration/dev-server): {
-    contentBase: path.join(__dirname, 'public'), // boolean | string | array, static file location...
-    compress: true,  // gzip
+    proxy: { // proxy URLs to backend development server
+      '/api': 'http://localhost:3000'
+    },
+    contentBase: path.join(__dirname, 'public'), // boolean | string | array, static file location
+    compress: true, // enable gzip compression
     historyApiFallback: true, // true for index.html upon 404, object for multiple paths
-    hot: true,   // hot module replacement. Depends on HotModuleReplacementPlugin
-    https: false, //true for self-signed, object for cert authority
-    noInfo: true // only errors & warns on hot reload
+    hot: true, // hot module replacement. Depends on HotModuleReplacementPlugin
+    https: false, // true for self-signed, object for cert authority
+    noInfo: true, // only errors & warns on hot reload
     // ...
   },