fix(gatsby-cli): use host option if it is passed (#11566)
fix(gatsby-cli): use host option if it is passed (#11566)

## Description

The serve command didn't use the "--host" option and just used localhost.
It got deleted in commit https://github.com/gatsbyjs/gatsby/commit/bff0cd377359ad1432a1da042349793096cb8d37

## Related Issues

Related to #8080 

gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby