Ghost install - permission denied

Ubuntu 18.04.5 LTS

Following this installation manual and on this step I run into the problem:

user@host /var/www/ghost ❯ ghost install
zsh: permission denied: ghost

All previous steps were done exactly according to the manual. Current user is in sudo group.
What am I missing here? Thanks.

Bump… Any ideas, please?

Ok, never mind. I gave up and deleted it…