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.
NextCloudPi – Own your bits
https://ownyourbits.com/nextcloudpiNextCloudPi is a Nextcloud instance that is preinstalled and preconfigured, and includes a management interface with all the tools you need to self host your private data in a single package. This is an official open source community project that aims at making it easier for everyone to have control over their own data.