Production: https://sunday-service-vr.web.app/
npm install -g firebase-tools
cd functions
npm install
cd ../webapp
npm install
npm run start
At this point, the app will be running on localhost:3000
and the emulator UI will be (probably) running on http://127.0.0.1:4000/
When closing this process, remember to press control-c ONCE. Doing so twice will do a hard stop where the firebase emulator may not have saved any data.