If the website is offline or not reachable for any reason, the whole presentation would be unavailable so we need to plan ahead for this kind of event.
Have a local server in the church acting as a stand-by server
Daily or weekly automated backups or another form of synchronization between the Internet-based server and the local server
[x] Decide which Internet Server to use (e.g. XAMPP)
If the website is offline or not reachable for any reason, the whole presentation would be unavailable so we need to plan ahead for this kind of event.