How to run Rails app with subdomains?

Question

I am trying to run my Rails app like this:

rails s -p 3000 -b lvh.me

The problem is that I am getting the following exception:

Exiting
.rvm/gems/ruby-2.2.0/gems/puma-2.14.0/lib/puma/binder.rb:233:in `initialize': getaddrinfo: nodename nor servname provided, or not known (SocketError)

What could be a problem? Thanks.

Answer 1

Call it like this:

rails s -p 3000 -b 0.0.0.0

then you can visit your page at http://lvh.me:3000/