Install with:

    cp systemd/conservancy-www-*.{service,timer} /etc/systemd/system
    systemctl enable conservancy-www-cleanup.service
    systemctl start conservancy-www-cleanup.service
    systemctl enable conservancy-www-update.timer
    systemctl start conservancy-www-update.timer

Monitor with:

    systemctl list-timers --all
    journalctl --catalog --follow --unit conservancy-www-update.service

Updates will fail unless `/var/www/website` has a git upstream, so set that with:

    git remote add upstream https://k.sfconservancy.org/website
    git branch --set-upstream-to=upstream/master master
    
Note that the update script does not run `migrate`.