Folder and file structure

The following folder structure shows the new folders and files to be added to the skeleton to complete it with a React frontend:

| mern_skeleton/
   | -- client/
      | --- assets/
         | ---- images/
      | --- auth/
         | ---- api-auth.js
         | ---- auth-helper.js
         | ---- PrivateRoute.js
         | ---- Signin.js
      | --- core/
         | ---- Home.js
         | ---- Menu.js
      | --- user/
         | ---- api-user.js
         | ---- DeleteUser.js
         | ---- EditProfile.js
         | ---- Profile.js
         | ---- Signup.js
         | ---- Users.js
      | --- App.js
      | --- main.js
      | --- MainRouter.js
  | -- server/
      | --- devBundle.js
  | -- webpack.config.client.js
  | -- webpack.config.client.production.js

The client folder will contain the React components, helpers, and frontend assets, such as images and CSS. Besides this...