You can point a CNAME somewhere, where you have e.g. https://github.com/joohoi/acme-dns https://github.com/joohoi/acme-dns which is meant just for this. There a

You can point a CNAME somewhere, where you have e.g. https://github.com/joohoi/acme-dns https://github.com/joohoi/acme-dns which is meant just for this. There are even providers (listed later in the README linked), that you can use this with, without managing another software.