Update README.md

[lucca65]

What issue does this PR close

Closes N/A

Changes Proposed ( a list of new changes introduced by this PR)

• Update docs for configuring our Nginx redirects, to include new Mailer configuration together with existing API

How to test ( a list of instructions on how to test this PR)

• Configure a new nginx server using the current configs

[lucca65]

@MatheusBuss, I've followed your suggestion, looks much better. I've also added section links

[henriquecbuss]

Add emoji for good measure

🤣