Auto Removal of Server Files

### Enhancement Type

A completely new feature

### Describe the enhancement

After stopping the server, the container could delete downloaded server files for saving space when the server is not being used, when an env variable is set.

Start by locating the container's server-stop handling and existing environment-variable configuration. Determine where downloaded server files are stored and define the opt-in behavior; done means stopping the server removes those files only when the variable is enabled, while the default preserves them.

Written by the indexing model from the issue text.