s99deploy -- deploy manifest-carrying apps to /opt under systemd

Install on a VPS:

  curl -fsSL https://deploy.smegg.me/install.sh | sudo sh

Or by hand:

  sudo curl -fsSL https://deploy.smegg.me/s99deploy -o /usr/local/bin/s99deploy
  sudo chmod 0755 /usr/local/bin/s99deploy

Docs: https://github.com/smegg99/S99Deploy