Add docker-compose.yaml file

- Add ports, volumes, env_file and environment options
- Update the .gitignore to add .env file
- Access URL for the external services now uses docker-compose hostnames.
- selenium-server is now a container service dependency

Selenium is no longer directly managed by directly by hublot, but is instead an
external service dependency.
This dependency is managed in docker-compose with a selenium server image.

This simplifies a LOT of things and make the project organization cleaner.

The build time has been reduced,
and the Dockerfile now respects the best practices.

Add the "webdriver-manager update ...." command.

webdriver-manager:12.0.6 is now in the dependencies.

The project now provides facilities to launch a standalone selenium server from
the project root.

Add `ci` to define a specific script for continuous integration

Fix styling issues identified by xo

use spaces for indent
setup jest env

Use jest for tests monitoring.

Fix a typo in package.json

This module allow to load all the files that must be injected into the client.

`package.json` contained a lot of missing or incorrect info. Fixes this.