Given the fact that Parse will be permanently shuttered on January 28, 2017, you have two options to host your apps.
1. Setting up the self-hosted Parse Server and then releasing a new app pointing to it
2. Migrating to a cloud hosting company that can provide Parse hosting service
There are pros and cons of each of these options. Here I discuss a few of them which may help you choose the better of the two that best suits you.