Any thoughts?
How long is a jiffy?
But also, you probably didnt set up your Docker container properly and it doesnt save persistent data. By nature containers are ephemeral, meaning you stop them and they are gone. If you want to keep specific data you need to save that on the Docker host.
Projects like Homarr mention which paths inside the container image should be mapped to the host in order to save those things like settings.
You simply need to follow that.
Without any additional info thats all.
For the future, "it doesnt work" is not great, try to provide exact details of your setup, what youre doing and what the outcome is (errors messages, logs, etc). That saves a lot of time for people trying to help you, but also for yourself.
And fyi this here is not a techsupport subreddit.
For specific questions about Docker issues i would suggest /r/Docker as example, and for Homarr itself the ideal place is their Github page.