Write documentation

Documentation https://ovh.github.io/cds is generated with Hugo. Source are under https://github.com/ovh/cds/tree/master/docs/content

Write / Generate / Test documentation:

cd ${CDS_SOURCES}
make install # to recompile all CDS binaries
GEN_PATH=${CDS_SOURCES}/docs/content/docs/components make doc 
cd ${CDS_SOURCES}/docs
hugo server