Add nodemon

[UlisesGascon]

Context

• This is part of release-1.5 Roadmap for 2019-2020 #148
• Possible dependency with task (Migration to Nodec v12) Migration to node 12 #150
• Strong dependency with (Grunt Migration) Migration from Grunt to npm scripts #149
• LOW task

Tasks

• Remove Forever dependency as is not in use.
• Add Nodemon as dependency
• Add task dev to the package.json that allow us to reload the server on changes, see
  is not in use, let's move to Nodemon as npm script
• Update the primary depdency list to the readme.md
• Check that the npm tasks are working as expected
• Update the readme.md with the extra relevant info (if needed)

Assignation

• This tasks is assigned to @servatj as he already is assigned for Migration from Grunt to npm scripts #149

Important

• Check the current roadmap Roadmap for 2019-2020 #148
• Don't forget to check the Contributing Guidelines and follow the Code of Conduct

[UlisesGascon]

Do you agree @servatj ?

[servatj]

Yes, I Agree maybe it's worth starting with #150 and upgrade to node js 12. I will assign it to me.

[servatj]

I just noticed that @ckarande picked #150 https://github.com/OWASP/NodeGoat/issues/156 I will continue working with this #156 first an then continue with #149.

[UlisesGascon]

Fix in #161