How to use Exo IDE, github and appfog to develop entirely in the cloud

1) Create a new project in Exo IDE. http://cloud-ide.com/
2) Choose PHP and appfog. https://www.appfog.com/
3) Deploy the app. Project->PaaS->Appfog and hit "update"
4) Create an empty repo in github. https://github.com/
5) Add the URL to the remote repos (use SSH link)
6) Generate a RSA keypair in Exo IDE
7) Add the generated public key to the github account Account Settings->SSH Keys
8) Do: git add .; git commit -m "My first commit"; git push <repo_name> master;
The people can see your project, fork, send you pull requests etc.