"docs/extra_exercises.md" did not exist on "865cddb79eca3e4514a22711ddb8ec0056e51e76"
WIP: Use Kaniko layer caching instead of two Docker images
This will simplify configuration and speed up builds.
Currently (kaniko 1.3.0) there is a failure on unpacking layers: conda claims that its root environment is corrupted. Need to try ou t this configuration upon releases of newer kaniko or investigate further.