Update INSTALL_SNAPCON.md

INSTALL_SNAPCON.md

@@ -24,9 +24,11 @@ To run Snap!Con, using [Overmind](https://github.com/DarthSim/overmind) or [Fore
 
 ## Heroku Deployment
 
+**TODO:** Update this section...
+
 When deploying to Heroku, the `heroku/nodejs` buildpack must be run before the `heroku/ruby` buildpack. Since Snap!Con runs on PostgreSQL, the Postgres add-on must also be added to the Heroku deployment.
 
-Finally, it may be necessary to downgrade the Heroku stack to `heroku-18`. Details on how to downgrade can be found [in this Heroku article](https://devcenter.heroku.com/articles/heroku-18-stack#using-heroku-18).
+Heroku Stack: `heroku-22`
 
 ### Example Data
 Example data can easily be generated by running `rake data:demo`. Please note that this command can fail if the database is not fresh.