I created ghost blog in OpenShift host. Everything worked fine.
I wanted to make some changes in css file(change the margin of the page title), so i did git pull the resources, made changes in css file locally, and git push back with command git push -f(force) openshift master, because without -f, I couldn't do this push.
After this "git push" command, my app got broke, and now, the http outputs 503 error...
I tried to restart my app, but it doesn't help. Don't know why it crashed.