Merge pull request #33 from diwanicki/patch-5

Update Deploying_on_Heroku.md

docs/Deploying_on_Heroku.md

@@ -44,6 +44,11 @@ Of course we haven't pushed Sal to Heroku yet. Let's fix that.
 ``` bash
 $ git push heroku master
 ```
+If you get a "Permission denied (publickey)." error at this point, it means you need to create/push an RSA public key for your current local machine account (the one active in terminal) to Heroku.
+
+``` bash
+$ heroku keys:add
+```
 
 You'll see Sal being pushed up to Heroku and Sal's requirements being installed. A Postgres database will also automatically be created for you. The database will be empty though, so let's populate it with what we need.
 
@@ -65,4 +70,4 @@ Your Sal installation is ready to use:
 $ heroku open
 ```
 
-As said earlier, the free version does have some limits. The most important with Sal is the number of rows you can have in the free database (10,000), so the more information you collect from each machine (Facter Facts and Munki Conditions), the larger your database is. It's a measley $9 a month to upgrade your database to 10 million rows, so it's easy to scale your database. For more information on upgrading your Heroku environment see [their documentation](https://devcenter.heroku.com/articles/upgrade-heroku-postgres-with-pgbackups).
+As said earlier, the free version does have some limits. The most important with Sal is the number of rows you can have in the free database (10,000), so the more information you collect from each machine (Facter Facts and Munki Conditions), the larger your database is. It's a measley $9 a month to upgrade your database to 10 million rows, so it's easy to scale your database. For more information on upgrading your Heroku environment see [their documentation](https://devcenter.heroku.com/articles/upgrade-heroku-postgres-with-pgbackups).