Install – Nextcloud
https://nextcloud.com/installThe Web Installer is the easiest way to install Nextcloud on a web space. It checks the dependencies, downloads Nextcloud from the official server, unpacks it with the right permissions and the right user account. Finally, you will be redirected to the Nextcloud installer. Right-click here and save the file to your computer.
Nextcloud - Official Image | Docker Hub
https://hub.docker.com/_/nextcloudFirst use. When you first access your Nextcloud, the setup wizard will appear and ask you to choose an administrator account username, password and the database connection. For the database use db as host and nextcloud as table and user name. Also enter the password you chose in your docker-compose.yml file.