client_max_body_size in conf

[jspeigner]

I need to add client_max_body_size 100M;
normally I would add this to /etc/nginx/nginx.conf but doesn't look like this file is used.

How do I add this value for a host?

[jspeigner]

I do see this setting here https://github.com/NginxProxyManager/nginx-proxy-manager/blob/master/docker/rootfs/etc/nginx/nginx.conf is it what's used? so its already at 200M