total RAM reported wrong in Docker

### Expected Behavior

Comfyui should report correct Total RAM based on Docker settings.

### Actual Behavior

ComfyUI reports wrong total RAM, due to it using psutil, which will report the host RAM, and ignores Docker --memory flag.

### Steps to Reproduce

- Run ComfyUI in Docker.
- Set --memory flag to limit memory to a lower amount.
- When starting ComfyUI, it will report the host's total RAM, not the amount set on the Container.
- This also causes smart memory management to fail, as it thinks it has more RAM available than it does, and the OS kills the process when it goes above it.

### Debug Logs

```powershell
Not applicable
```

### Other

This issue is due to ComfyUI using psutil.virtual_memory() to check available memory. PSUtil however uses /proc filesystem to retrieve this info, which reports the host's stats, not the container's.

This could either be solved by some flag use cgroups to retrieve that information, or a simpler flag that limits available memory to a set amount.