allow to set a custom host

[hpello]

Fixes #222

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[flovilmart]

I think host is misleading for the beginners as this refers to the bound IP address.

Also, no need to update the address in the README. Locallhost will still be working fine. Not sure 0.0.0.0 will as this represents nothing much for the local machine

[hpello]

Thanks for your answer.

Sure. Any suggestion? What about --address and ADDRESS then?

I don't see why 0.0.0.0 would not be working on the local machine? I had changed the address in the README (as well as in the console.log message) in order not to confuse users, who could think their dashboard is not accessible from the outside (localhost) when it actually is (0.0.0.0).
But I'll leave localhost if you prefer.

[flovilmart]

It's just that when people will see: Dashboard running on 'http://0.0.0.0/dashboard' they will paste that on their web browser and won't be able to access it

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[hpello]

Well, with the current version 1.0.7, it works well for me on Firefox and Chrome :

[flovilmart]

ok then, but know that 0.0.0.0 don't mean localhost...

[hpello]

👍

And for the adress/host flag and env var?
I liked the host one, as it will work with any host, such as localhost, 192.168.1.16 or mywebsite.com, but I'm fine with anything you guys would like.

[flovilmart]

we can stick with host, @peterdotjs what do you think?

[drew-gross]

I also prefer localhost but I'm just going to merge this and then update the docs.