This is an open source version of the cloud backend for Snap!.
First, install the server with npm install -g c2stem/snap-cloud. Then, ensure that an instance of MongoDB is running and start the server with:
snap-cloud start
Additional commands for managing users and projects include:
snap-cloud list-users
snap-cloud list-projects
snap-cloud delete-project <user> <project>
snap-cloud add-user
snap-cloud delete-user
snap-cloud set-email <user> <email>
snap-cloud set-password <user> <password>