Fix react-scripts peer-deps link local issue (facebook#6579)

Author: transitive-bullshit

packages/react-scripts/config/webpack.config.js

@@ -258,7 +258,7 @@ module.exports = function(webpackEnv) {
       // We placed these paths second because we want `node_modules` to "win"
       // if there are any conflicts. This matches Node resolution mechanism.
       // https://github.com/facebook/create-react-app/issues/253
-      modules: ['node_modules'].concat(
+      modules: ['node_modules', paths.appNodeModules].concat(
         // It is guaranteed to exist because we tweak it in `env.js`
         process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
       ),