Email Subscription Api accepts user email address and saves the data into postgresql database. Incase if user is already enrolled then Api responds with "Email already in use" message. Some basic backend validations are also in place and can be extended.
Sample Api to refer in postman: https://ravitejakolla-portfolio.herokuapp.com/subscribe/signup
Sample request body: {"email" : "ravitejakolla@email.com"}
Technology Stack: NodeJs, ExpressJs, KnexJs, Postgresql
Platform: Heroku & Heroku Postgres