The launcher server uses DotNet version 8.0. You need to install this software on your VPS. In addition, you need to deploy a MySQL database (MariaDB) and configure it.
apt update
sudo apt install mariadb-server
sudo systemctl start mariadb.service
mysql
CREATE USER 'launcher'@'%' IDENTIFIED BY 'YOUR PASSWORD';
GRANT ALL PRIVILEGES ON *.* TO 'launcher'@'%' WITH GRANT OPTION;
CREATE DATABASE launcher;
You may also need an nginx server if you don't have one: