add notes about chef server url and dev mode configuration
add notes about chef server url and dev mode configuration

jzohrab/supermarket,leftathome/supermarket,nellshamrell/supermarket,rafaelmagu/supermarket,dpnl87/supermarket,leftathome/supermarket,tas50/supermarket,juliandunn/supermarket,juliandunn/supermarket,tas50/supermarket,robbkidd/supermarket,leftathome/supermarket,tas50/supermarket,tas50/supermarket,chef/supermarket,robbkidd/supermarket,chef/supermarket,juliandunn/supermarket,rafaelmagu/supermarket,chef/supermarket,chef/supermarket,juliandunn/supermarket,robbkidd/supermarket,jzohrab/supermarket,rafaelmagu/supermarket,dpnl87/supermarket,nellshamrell/supermarket,leftathome/supermarket,robbkidd/supermarket,dpnl87/supermarket,dpnl87/supermarket,rafaelmagu/supermarket,jzohrab/supermarket,chef/supermarket,nellshamrell/supermarket,jzohrab/supermarket,nellshamrell/supermarket