Awesome

ContextRouter

ContextRouter is a simple plug-and-play plugin allowing you to route different contexts based on the http_host context settings that you need to set anyway.

In essence it's like the Gateway plugin from the docs, except you don't have to manually edit the plugin: it takes the settings you have already configured in your context, caches it and routes based on that.

GETTING STARTED

1. Install the plugin (you're working on that, good job!)
2. Make sure your contexts have http_host context settings set.
3. (optional) Assign http_host_aliases context settings where needed to alias other hosts.
4. Clear cache via Site > Clear Cache to rebuild the cache file.

If you need routing based on subfolders as well, then it's recommended to use xRouting instead, which is a more powerful alternative.