function describe(name) {
        return new Promise((res, rej) => pm2.describe(name, (err, details) => {
            if(err) { rej(err) }
            else { res(details.map(p => ({pid: p.pid, name: p.name, args: p.pm2_env.args}))[0]) }
        }))    
    }
@param {string} name
@returns {Promise<{
  pid: number,
  name: string,
  args: string[]
}>}