Looks very cool and promising.

I'm wondering what's the power draw for the Pi with this one since it "Loads index.html in a headless instance of Chromium, using Puppeteer". Isn't Puppeteer quite a power hungry process?

Would it run on Pi Zero with a battery attached and how long would it last with updates once a minute or once every 5 minutes?

I'm thinking about possible projects that would not have AC power all the time, maybe something solar powered for a dashboard outside.