Update companion web application
The companion web application needs to be updated in two main points:
The dependencies of the web application are outdated, as they are managed manually and were never touched again.
The help section regarding the interaction with pseuCo.com is outdated: After Microsoft Edge was rebuild as a Chromium-based browser, the WebSocket based connection with pseuCo.com is now also supported by said browser. Hence only Safari does not support that approach.