As per https://help.nextcloud.com/t/how-to-install-an-always-up-to-date-version-of-nextcloud-on-linux/596 I have succesfully run:
sudo snap install nextcloud
This downloads nextcloud and mounts it. I had expected that after doing this, I would be able to connect to http://localhost. But I get connection refused, so it seems there is a step in which I start the nextcloud service. I have, however, been unable to find that step.
What is the next step?