Create labels.dwyl.com subdomain

[SimonLab]

Create domain and link it to the application deployed with Fly.io
see https://fly.io/docs/app-guides/custom-domains-with-fly/

[nelsonic]

I'd be keen to figure out how to create a new DB on the same Fly.io instance as the Hits DB
so that we don't have to spend $2.99/month for the DB just to run a label sync ... which has been free on heroku ...
Obvs $36/year is insignificant compared to the engineer time but will still be good to know how to deploy multiple DBs to the same instance on Fly.io 💭