Host the application on Heroku

[louicoder]

Host the application onto the Heroku platform. Make sure that all the environmental variables are set well
The variables include

• PORT, this is the server address.
• TWILIO_SID, this is the Twilio SID
• TWILIO_TOKEN, this is the Twilio token
• SENDER_EMAIL, this is the gmail address of the sender
• SENDER_PASSWORD, this is the sender's password to login to gmail servers

[louicoder]

This issue has been resolved and didnot require a pull request. See attached Screenshot for details. If need arises for more implementation then it can be re-opened .
cc: @FrankMwesigwa @Anekenonso @DrKimpatrick