add vagrant file

[gsambrotta]

No description provided.

[gsambrotta]

doing vagrant up it gives me all green and state that server is running at: http://127.0.0.1:4000/ but when i visit the url there is no connection.
I also try with localhost and 0.0.0.0

Can someone review the file and test it please?
/cc: @xMartin @gnunicorn @autarc

[xMartin]

Quick guess: Start jekyll in the guest console with jekyll serve --host 0.0.0.0.

[gsambrotta]

@xMartin that did it but i'm wondering if is something that people always have to do it or is just about my machine.
Should we document this command?

[xMartin]

Yes, this needs to be done always to make it reachable from the host.