Update building documentation for macOS
Problem: The k3s build scripts rely on GNU utils, like sed, so when
these scripts are run on a macOS environment they don't work as
expected.
Solution: Update the documentation to point out this scenario and
suggest the reader to spin up the Linux virtual machine defined on
the Vagrantfile within this project.
Signed-off-by: Jonnatan Jossemar Cordero <jonnatan.cordero@suse.com>
There are some issues and quirks in the markdown documentation files
suggested by the markdownlint project checker that might benefit from
being fixed, which this patch does.
Change-Id: I33245825e5bb543b5ce1732204984d4a0b169668
Signed-off-by: Joakim Roubert <joakimr@axis.com>
