docs: Add recommendation notes to deployment platform list

Author: sman591

docs/deployment.md

@@ -16,22 +16,28 @@ To get started, deploy HackathonManager onto one of three supported platforms:
 
 ## Heroku
 
-Easiest & quickest way that requires little server knowledge, however isn't cheap (free tier not recommended)
+Easiest & quickest way that requires little server knowledge.
+
+Recommended if you aren't familiar with running a Linux virtual machine and can spend ~$17/month.
 
 [Get Started with Heroku »](deployment-heroku.md)
 
 ## Dokku
 
-A free alternative to Heroku, runs on your own virtual machine
+A free alternative to Heroku, runs on your own virtual machine.
+
+Recommended if you're on a budget and can set up Dokku on a Linux virtual machine, usually $5-10/month.
 
-[Get Started with Heroku »](deployment-dokku.md)
+[Get Started with Dokku »](deployment-dokku.md)
 
 ## OKD/OpenShift
 
-"Enterprise Kubernetes for Developers" packaged with a useful management UI + tooling
+"Enterprise Kubernetes for Developers" packaged with a useful management UI + tooling.
+
+Recommended if you already have an existing, reliable OKD/Kubernetes cluster.
 
 [Get Started with OKD »](deployment-okd.md)
 
 ### Other methods
 
-HackathonManager can also be deployed the same as any other Rails app, however this is **not** natively supported and will require you to fork this repo to integrate code changes.
+HackathonManager can also be deployed the same as any other Rails app, however this is **not** natively supported and will require you to fork this repo to integrate & maintain code changes.