chore(deps): update dependency uis/devops/continuous-delivery/ci-templates to v6

See merge request !90

Add in the debugpy configuration which has somehow got lost along the
way. The debugpy port is already exposed in docker-compose.yaml and so
this config was always _meant_ to be in the development image but seems
never to have been added.

This unblocks support for debugging running images in IDEs such as VS
Code.

Closes #106

feat: add debugpy to development images

Closes #106

See merge request !100