heroku: add page (#1112)

pages/common/heroku.md

@@ -0,0 +1,27 @@
+# heroku
+
+> Create and manage Heroku apps from the command line.
+
+- Login to your heroku account:
+
+`heroku login`
+
+- Create a heroku app:
+
+`heroku create`
+
+- Show logs for an app:
+
+`heroku logs --app {{app_name}}`
+
+- Run a one-off process inside a dyno (heroku virtual machine):
+
+`heroku run {{process_name}} --app {{app_name}}`
+
+- List dynos (heroku virtual machines) for an app:
+
+`heroku ps --app {{app_name}}`
+
+- Permanently destroy an app:
+
+`heroku destroy --app {{app_name}}`