fix: command line args

[andrey-pavlenko]

A convenient tool for me, thank you!
But if I specify the path to the directory (ex pugserver html/), an error occurs:

Error: listen EADDRINUSE: address already in use /usr/bin/node
    at Server.setupListenHandle [as _listen2] (node:net:1881:21)
    at listenInCluster (node:net:1946:12)
    at Server.listen (node:net:2061:5)
    at Object.<anonymous> (/mnt/data/Develope/qq-webcomponent-vs-iframe/node_modules/.pnpm/pugserver@1.1.1/node_modules/pugserver/pugserver.js:24:6)
    at Module._compile (node:internal/modules/cjs/loader:1434:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1518:10)
    at Module.load (node:internal/modules/cjs/loader:1249:32)
    at Module._load (node:internal/modules/cjs/loader:1065:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:158:12)
    at node:internal/main/run_main_module:30:49
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1925:8)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  code: 'EADDRINUSE',
  errno: -98,
  syscall: 'listen',
  address: '/usr/bin/node',
  port: -1
}

because the variables take these values { port: '/usr/bin/node', pugPath: 'html/' }.

I made the following changes:

• Add commander package
• Move code to startServer function

Now arguments can be passed in any order and the arguments still have their default values.