nextcloud

Nextcloud needs a more recent PHP version than the box can offer. If you really want nextcloud, the most convenient way is to install Debian first. Don't know how Nextcloud will perform on that box, the manual states:

Nextcloud needs a minimum of 128MB RAM per process, and we recommend a minimum of 512MB RAM per process.

In low memory environments, some features or apps may require adjustments to their defaultsettings in order to function (or, in some cases, may need to be disabled outright).

When I remember well the 326 has 512MB in total, which should be shared with other processes.