browser-sync

TLDR

Start a server from a specific directory

$ browser-sync start --server [path/to/directory] --files [path/to/directory]

Start a server from local directory, watching all CSS files in a directory

$ browser-sync start --server --files '[path/to/directory/*.css]'

Create configuration file

$ browser-sync init

Start Browsersync from configuration file

$ browser-sync start --config [config_file]