Currently no documentation is provided, since project is in development and not ready to use by general public.

To get your own just use openssl:

openssl genrsa -out private_key.pem 4096
openssl rsa -pubout -in private_key.pem -out public_key.pem

Keep in mind server should store it's private key and service public keys (never private ones!). However it's not a security risk to store server public key within keys folder.