Docker images generation instructions updated Fixes #814
Docker images generation instructions updated
Fixes #814

Signed-off-by: Claudio Mezzasalma <acdb73fa11473662b10f45613ec005f8be976786@eurotech.com>

LeoNerdoG/kapua,LeoNerdoG/kapua,stzilli/kapua,LeoNerdoG/kapua,LeoNerdoG/kapua,LeoNerdoG/kapua,stzilli/kapua,stzilli/kapua,stzilli/kapua,stzilli/kapua