Yes, you'll need to deploy your app on OpenShift in order to be eligible for prizes. You can sign up by going to https://openshift.devpost.com/details/form. I'd encourage you to do this as soon as possible so we can grant you access to OpenShift. If you've already signed up, you should be able to access your account by log in to GitHub and then go to the following URL:
Once you have accepted the invitation, you are all set to authenticate to the hackathon environment with your GitHub credentials. Simply go to https://console.hackathon.openshift.com and click on "Login with Github."