Update readme

Author: ciscoproo0

backend/README.md

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 ## Fastfeet API
 
-Fastfeet API was built using NodeJS, Postgres to persist data regarding aplication and Redis (with beQueue) to manage email dispatch.
+Fastfeet API was built using NodeJS and Postgres to persist data regarding application.
 
 <p align="right"><a href="https://documenter.getpostman.com/view/4255399/SzezdCGx">Here </a>you will find all API requests and parameters</p>