Unix-based operating system (Mac or Linux), you may experience issues on Windows.
Hydra stores the substrate data in an external PostgresSQL 12 instance. The scaffolding tool provides a convenient setup for running the database instance from a Docker image. In this case the standard docker environment (docker and docker-compose) should be available.
The best way to start is to clone the template repo and proceed from there. Otherwise, the scaffold command is also available with installation steps outlined below.