[Boot] Automatic configuration of controllers in Application

[kjdelisle]

Story

As a LoopBack 4 user, I would like all of the controller files I place (or generate!) in ./src/controllers to automatically be associated with my Application so that I don't have to type app.controller(...) over and over again.

Acceptance Criteria

• Must read all files of the format *.controller.js from the controllers directory
• Must associate all of the controllers exported classes with the application using the .controller function.
  • Take each exported class from the *.controller.js file (subject to change based on user feedback)
• There should be a blog post informing users that this is now live (once this change has been released!), and explain how it works.
• Docs on loopback.io
• Refactor/update example code (loopback4-example-getting-started)
• Update app template(s) in CLI to use @loopback/boot

Notes

• Extensibility is out of scope; it does not need to accommodate anything beyond the current story for Controllers.

[jonathan-casarrubias]

+1