message: allow to set static port
diff: @@ -4,11 +4,11 @@ import webpack from 'webpack';
  import Koa from 'koa';
  import koaWebpack from 'koa-webpack';
  -import {log} from './utilities';
  +import {log, namedArgument} from './utilities';
  import {createWebpackConfiguration} from './webpack-config';
  -export async function serve(..._args: string[]) {
  - const port = await getPort({port: 8910});
  +export async function serve(...args: string[]) {
  + const port = namedArgument('port', args) ?? (await getPort({port: 8910}));
  const url = `http://localhost:${port}`;
  const publicPath = `${url}/assets/`;
  const filename = 'extension.js';
  