monitor() function is a live server function. Usually,
the Resource class manages live server control. However, the
monitor() function make it easier to start live server in routes.
It is used in routes to start live server if for a reason, a live template file is inaccessible.
monitor(); // start live server
quirks mode error response in console. The best way
to start live server to avoid quirks mode error is to start it in template
files within html tags using the @live() or @live
directive.