Feature: Env var derivation + running application

[brunomenezes]

Summary

Code changes to improve the deployment and maintenance of API. The changes aim to improve both application's resilience during maintenance done by the cloud provider.

Changelog:

• Added a new script to provide the Applications target with all the configuration it needs. Check the README inside the new deploy/ folder for more details.
• Added new dependencies to help run shell commands and get arguments passed to the new run script.
• Refactor the Procfile to call simple old npm-script.

PS: I am not using a TS file. It is just a simple JS with JSDocs around to define types and other helpful information for posterity.