http://mail.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/selfhosting/nextcloud/lazy.html
This is a very simple installation of nextcloud, you can use it as a server to host your keepass passwords database for example. To do so, just use the URL feature of keepass, and use the webdav link that points to the kdbx file you uploaded on the nextcloud server. You can also just install the keeweb extension on nextcloud for it.