Introduce feature flag component

Co-authored-by: Andrew Watkins <andrew.watkinz@gmail.com>
Co-authored-by: Brandon Farmer <bthesorceror@gmail.com>

ui/src/shared/components/FeatureFlag.tsx

@@ -0,0 +1,15 @@
+import {SFC} from 'react'
+
+interface Props {
+  children?: any
+}
+
+const FeatureFlag: SFC<Props> = props => {
+  if (process.env.NODE_ENV === 'development') {
+    return props.children
+  }
+
+  return null
+}
+
+export default FeatureFlag

ui/webpack/dev.config.js

@@ -145,6 +145,9 @@ module.exports = {
     ],
   },
   plugins: [
+    new webpack.DefinePlugin({
+      'process.env.NODE_ENV': JSON.stringify('development'),
+    }),
     new webpack.DllReferencePlugin({
       context: process.cwd(),
       manifest: require('../build/vendor.dll.json'),