I'm trying to install Mattermost using Docker via https://github.com/mattermost/mattermost-docker After upgrading to the latest version, I'm no longer able to start the Docker deployment due to database errors.
The mattermost-docker repository uses an older, outdated version of PostgreSQL which is no longer supported by Mattermost.
Please refer to this guide on how to update: https://github.com/mattermost/mattermost-docker/issues/489#issuecomment-790277661
Note: The Mattermost team is working on a new and improved docker deployment. More details will be shared soon.