Add Quiz at start to gauge Learner Knowledge

[douglowe]

Add a quiz for making sure learners have sufficient Bash (and Git?) knowledge.

[douglowe]

Example of doing this for python: https://uomresearchit.github.io/programming_with_python/01-introduction/index.html

[douglowe]

Knowledge to test (very bash focused - no powershell here, but that is okay?):

• listing directory contents
  • ls
• changing directory location
  • cd .. ; cd [directory]
• reading (text) file contents
  • cat [filename.txt]
• setting optional arguments / flags for commands
  • -s ; --long-flag ; --argument [argument value]
• set (and export?) environment variable
  • ENVVAR=value ; export ENVVAR=value
• read / print environment variable
  • echo $ENVVAR ; echo ${ENVVAR}