Fix #21 The left sidebar always shows child items (#22)

* Fix #21 The left sidebar always shows child items. With this commit it checks if the section is selected then it shows everything below that section or if a node is selected only shows its children.
* version bump to 0.0.17
Signed-off-by: vsoch <vsochat@stanford.edu>
Co-authored-by: vsoch <vsochat@stanford.edu>

Merge pull request #20 from vsoch/add/breadcrumb-dynamic-level

supporting more nesting of breadcrumbs

Jekyll containerisation (#17)

* Jekyll containerisation
* docker-compose conf
* Update docker-compose.yaml
* adding more detailed instructions to README,

and we are still needing to debug an issue with bringing up the latest
jekyll container (4.0.0) that seems to have a permissions error to
write to /usr/gem/cache that does not exist in the container

Signed-off-by: vsoch <vsochat@stanford.edu>

* updating jekyll/jekyll to use 3.8 as 4.0 has permissions error bug
Signed-off-by: vsoch <vsochat@stanford.edu>

Co-authored-by: Jinna Balu <jinna.balu@wisestep.com>
Co-authored-by: vsoch <vsochat@stanford.edu>