cookiecutter https://github.com/castlecraft/frappe_container_cookiecutter.git
  [1/6] github_username (castlecraft):
  [2/6] project_name (Castlecraft Frappe Custom):
  [3/6] project_slug (castlecraft_frappe_custom):
  [4/6] container_image_namespace (castlecraft):
  [5/6] project_version (v0.0.1):
  [6/6] Select license
    1 - MIT license
    2 - BSD license
    3 - ISC license
    4 - Apache Software License 2.0
    5 - GNU General Public License v3
    6 - Not open source
    Choose from [1/2/3/4/5/6] (1): 1

Open the created directory in code, it generates the container builder repo.