Just cd in the folder and run docker-compose up. A golang webserver and a postgres instance will be started. The frontend is served from the golang server.
If you want to enable email confirmation and Facebook login, you need to specify FACEBOOK_CLIENT_ID, FACEBOOK_CLIENT_SECRET, EMAIL_SMTP_USERNAME, and EMAIL_SMTP_PASSWORD in the docker-compose.yml.
If you want to skip email confirmation for development purposes, change SKIP_EMAIL_VERIFICATION in docker-compose.yml to true.