Game Specific Index
You can see this page at
/<game-id>/start. This page is supposed to be displayed at a big screen where everyone can see it. You can for example hang a big screen right above the dart board at the front or maybe use a projector to beam this page on a wall.
This page can let your players scan the QR code with a smartphone for example and then setup a game. After starting a game this page will automatically redirect to the corresponding scoreboard page and show the score of the ongoing game.