it will be an array so you need to put square brackets around it exclude: ['Bedroom', 'Living room', 'Bathroom']
you don’t put a config file in the repository, that’s what the user has to add into his config file in ~/MagicMirror/config/config.js on it’s own.
you would have to add the last line into defaults
Module.register('sonos', {
defaults: {
showStoppedRoom: true,
showAlbumArt: true,
showRoomName: true,
animationSpeed: 1000,
updateInterval: 0.5, // every 0.5 minutes
apiBase: 'http://localhost',
apiPort: 5005,
apiEndpoint: 'zones',
exclude: []
},