1. create new DNS A or AAAA records for HTTPS to be served

$ nsupdate -k Kzembla.zenr.io.+015+56161.private 
> update add zembla.zenr.io           600 AAAA 2a01:4f8:c17:3dd5:8000::10
> update add portainer.zembla.zenr.io 600 AAAA 2a01:4f8:c17:3dd5:8000::10
> update add test.zembla.zenr.io      600 AAAA 2a01:4f8:c17:3dd5:8000::10
> send
> quit

2. edit/customise docker-compose.yaml

3. edit/customise container/caddy/Caddyfile for each DNS A or AAA records to be served

4. raise caddy and containers to be reversed proxied with HTTPS

docker-compose up -d