How to Apply Changes to an Existing Docker Container?

If you're worried about losing your data, you can copy your existing configurations or data from the container to your host system before you create a new one. It’s a bit of a hassle, but it's doable. Just remember to set up persistent storage with volumes in the new container to avoid this hassle in the future.

Also, for ease of use in managing configurations and deployments, consider using Docker Compose. It simplifies the process of defining and running multi-container Docker applications.

Unfortunately, you can't modify an existing container directly. Containers are designed to be ephemeral, so if you need to implement changes like adding hardware acceleration, you'll need to create a new container. Just be aware that you'll lose any data that's not been saved externally since your current setup doesn't seem to have persistent storage. You really should mount those volumes!

Just a heads-up: you can’t change the `--user` flag of a running container. If you want to tweak settings like adding groups, consider logging into the container and making those adjustments directly. But really, re-creating the container is the right way to go about it—it’s just how Docker is designed to work!

To ensure you don’t lose configurations in the future, export your current settings or data before destroying your container. Once you've set up the new one with persistent volumes, you can import your previous config back in!