serves a local directory (process.cwd() + 'public' is the default)
it is recommended to install @grundstein/cli instead, which includes both this package, as well as @grundstein/builder in one cli.
npm i @grundstein/server// show full help
grundstein-server --help
// serve the ./public directory
grundstein-server
// serve specific directories
grundstein-server --dir local/directory/path /global/directory/path
// serve on specific port
grundstein-server --port 2323