This is a new PR to organize and get better code quality and workflow.

• Implement prettier, babel and eslint for better code quality.
• Implement nodemon for monitoring new changes and babel-node for compiling code.
• Implement a command handler.
  Instead of having a bunch of switch/if-else statements we can use a nice command handler to deal with this for us. Docs.
• Implement a better config based on the proposed guide. Code