A computer with a modern operating system and networking software can host the wiki server. This combination of resources can be found in many places.

# Computers

Laptops you already own.

Servers designed for many services.

Virtual Machines configured for one thing.

PaaS cloud services.

Docker containerized packages.

# Configuration

A host can run many servers and a server can serve one or many sites.

Development with multiple servers.

Farms with many sites served by one server.

Security for authenticating site owners.

Update with improvements from open source.