You'll need to complete prepare before you do this.
To develop Hatsu, you should first install Rust and some dependencies.
# Arch-based distro
sudo pacman -S git cargo openssl
# Debian-based distro
sudo apt install git cargo libssl-dev
First copy the variables,
HATSU_DOMAIN to your prepared domain
HATSU_PRIMARY_ACCOUNT to your desired user domain
# copy env example
cp .env.example .env
# edit env
Then create the database file and run:
# create database
# run hatsu
Hatsu now listen on
localhost:3939, and in order for it to connect to Fediverse, you'll also need to set up a reverse proxy.