Docs: Add README to build the network image
Docs: Add README to build the network image

This provides a guide of how to build and
verify the network image

Signed-off-by: Gabriela Cervantes <7478955d4356a4dc893d64d1345a99c9f58c91ab@intel.com>

bwarden/tests,chavafg/tests,MarioCarrilloA/tests,bwarden/tests,devimc/tests,chavafg/tests,sboeuf/tests,MarioCarrilloA/tests,clearcontainers/tests,clearcontainers/tests,devimc/tests,sboeuf/tests