wkhtmltopdf reported an error: Exit with code 1 due to network error: ProtocolUnknownError

[martinllanos]

When creating an odoo 13.0/15.0 image with the new version of doodba-copier-template add the "hostname:" parameter in prod.yml
This does not allow wkhtmltopdf to create documents.
The solution found to avoid this error was to comment the hostname line

version: "2.4"

services:
odoo:
extends:
file: common.yaml
service: odoo
restart: unless-stopped
#hostname: "www.example.com"
env_file:
- .docker/odoo.env
- .docker/db-access.env
environment: