Default dns doesn't work on docker

[marcodearaujo]

Removed option "-a localhost", because this dns isn't recognized by
docker

Removing this option makes http-server defaults to 127.0.0.1

vuejs/vue-cli#36

[chrisvfritz]

Setting to localhost is useful for testing from other devices on a network, such as mobile devices, VMs, or the computers of team members, so removing it for the Docker edge case would actually cause pain for most users. I recommend either:

• manually updating the config of the project for Docker,
• opening an issue with http-server for better Docker compatibility, or
• opening an issue with Docker (or the Docker image you're using) to work in this case.