The git repo for cyber-dojo's setup custom choices. You can specify and use an alternative custom start-point. Assuming the files in the specified repo have the correct format:
$ ./cyber-dojo start-point create --help
$ ./cyber-dojo start-point create seb --git=https://github.com/seb/start-points-custom.git
$ ./cyber-dojo up --custom=seb
New architecture (currently live on https://beta.cyber-dojo.org only)
This repo specifies the the default custom start-points when creating your own start-point image using the cyber_dojo_start_points_create.sh script. Viz, the first github URL option in this command:
$ ./cyber_dojo_start_points_create.sh \
acme/my-start-points \
--custom \
https://github.com/cyber-dojo/start-points-custom \
--exercises \
https://github.com/cyber-dojo/start-points-exercises \
--languages \
https://github.com/cyber-dojo-languages/csharp-nunit