How do I connect heroku to Salesforce?

Related questions

1. How does heroku work?
2. Is heroku IaaS or PaaS?
3. Is Heroku connect free?
4. Is Heroku hosting free?
5. Is heroku open source?
6. Is heroku AWS?
7. Does salesforce own Heroku?
8. Does heroku use AWS?
9. Is AWS cheaper than Heroku?
10. Does heroku support Mongodb?

Tags

1. #configure
2. #authenticate
3. #behalf
4. #oauth
5. #instance
6. #salesforce
7. #using
8. #connect
9. #connection
10. #allow
11. #postgres
12. #calls
13. #database
14. #synchronize
15. #between
16. #heroku