Add support for virtual servers

[capricorn86]

E.g.

      const browser = new Browser({
           settings: {
                  virtualServers: [{
                        baseURL: '',
                        directory: ''
                  }]
           }
      });

[OlaviSau]

Is this like you a requests to a certain base url would be handled by a directory?

[capricorn86]

@OlaviSau the idea is that you would be able to simulate a local server serving from the file system. This will make server-side rendering much easier.

Files:

• build
  • index.html
  • main.js
  • style.css

Code:

      const browser = new Browser({
           settings: {
                  virtualServers: [{
                        baseURL: 'https://localhost:3000',
                        directory: './build'
                  }]
           }
      });
      const page = browser.newPage();
      await page.goto('https://localhost:3000');

What do you think?