Add right-for-you page for Simple
Enable a contact endpoint that sends mail on Heroku
Use flask-heroku to set env vars
Use the debugging server
convert PORT to int to serve
Use a subject, or it will fail
Use gunicorn again for production
Fix incorrect rel for home link on contact page
Use X-Forwarded-For to get IP address on Heroku
Add the headers to the email
Add link to siren spec from home page