Folder structure and best practices for a MERN app

I currently follow this pattern in my projects. I have a question regarding components and containers, and redux. Redux docs say follow the duck pattern which means to have actionTypes, actions, reducers all in a single file. I'm also concerned about...

To describe an entity or a resource, which word would you use?

Exception naming and error code best practices ?

What's your piece of advice on exception naming these days ? Standard (Java-style, old?) convention would be to keep them at the root of your namespace with an Exception suffix: Example\Project\ConfigurationException Symfony splits them by purpose/c...