chore(webpack): Don't show warnings on dev server overlay

webpack.config.js

@@ -247,6 +247,12 @@ function getConfig(options = {}) {
  */
 function getDevServerConfig() {
     return {
+        client: {
+            overlay: {
+                errors: true,
+                warnings: false
+            }
+        },
         https: true,
         host: '127.0.0.1',
         proxy: {