Building causes Forbidden error

[C-Fu]

Steps to recreate:

1. create folder: mkdir -p /volume2/docker/grav/html
2. git clone the repo to /volume2/docker/grav
3. edit the docker-compose file
   `version: '3.3'
   services:
   grav:
   container_name: grav
   build: ./
   ports:
   • 8080:80
     volumes:
   • /volume2/docker/grav/html:/var/www/html`
4. run docker-compose: sudo docker-compose build .
5. (maybe) run docker-compose up -d

[aslmx]

Came here to report the same. (I'm a first time Grav user).
It seems that grav is not installed into the local volume folder.
It seems like there are additional steps necessary?