Why is my nginx proxy manager container 17GB?

[clendee]

Hi,

I run Nginx Proxy Manager in a docker container, nested inside an incus container.
The size of my container is 17G which seem extortionate for a service like this.

The vast majority of these large files are stored inside /var/lib/docker/vfs/dir as seen in the screenshot.
Is this normal behavious for Nginx Proxy Manager? Can it be reduced in any way?

Thanks.