error editing config

Hi there!
First, thanks for the nice tool!

I run into the issue when I tried to change the configure.
By pressing "o" i get the error

> "exec: "sh": executable file not found in $PATH

Did i missed something? I'm using lazydocker in a docker.

System:
lazyteam/lazydocker:latest
ubuntu 18.04
docker: Docker version 19.03.2, build 6a30dfc

Thanks!
pix_1

EDIT:
This not happen when using the binary version.