Update issue templates

Create CONTRIBUTING.md

Merge pull request #16 from fetahokey/add-code-of-conduct-1

Create CODE_OF_CONDUCT.md

Merge pull request #13 from fetahokey/develop

Merge pull request #12 from fetahokey/Feature_Authentication_JWT_P2_#5

add the get stats `getStats` function

add the stats route

clean the code

get all users route

add `getUsers` funtion

add `verifyTokenAndAdmin` function

add `delete` `get` routes for the auth

add `deleteUser` function on the auth controller

activate the `morgan` logger in the index.js