Some of these instructions may work on other flavours of unix, and others may not.
Install git with
sudo yum install git -y
Download the sport selection program with
git clone https://github.com/PureGero/SportSelection.git
Install the program with
sudo SportSelection/install.sh
Then, if you want automatic HTTPS certificates, set the email and hostname
fields in the config. You'll be accepting Let's Encrypt's terms of service to
acquire and use the https certificate
(https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf).
vim SportSelection/config.json
Start the service with
sudo systemctl start sportselection.service
There might be a firewall installed, add port 80 and 443 to it with
sudo firewall-cmd --zone=public --permanent --add-port=80/tcp --add-port=443/tcp
sudo firewall-cmd --reload
It's now all set up and good to go!
Log in to the admin console at http://SERVERNAME/admin.html to get started.