Add ability to customize localhost url

I am running localhost from a custom host (https://myapp.local).
The way the localhost detection is currently implemented, the tracker does not recognize if I am on localhost or not, and therefore sends the request.

plausible-tracker/src/lib/request.ts

Lines 40 to 43 in 294405c

    
           const isLocalhost = 
        
             /^localhost$|^127(?:\.[0-9]+){0,2}\.[0-9]+$|^(?:0*:)*?:?0*1$/.test( 
        
               location.hostname 
        
             ) || location.protocol === 'file:';

Possible Implementation

I would suggest to add an option where a user can change their localhost url and therefore making isLocalhost true. Happy to add a PR if you agree.

	const isLocalhost =
	/^localhost$\|^127(?:\.[0-9]+){0,2}\.[0-9]+$\|^(?:0:)?:?0*1$/.test(
	location.hostname
	) \|\| location.protocol === 'file:';