Update document for docker build
Update document for docker build

Signed-off-by: Yuvraj <e3d36ede2bcd6172e09b090880659a9bc446522d@gmail.com>

mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,tinyspeck/vitess,tinyspeck/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,tinyspeck/vitess,vitessio/vitess,tinyspeck/vitess,tinyspeck/vitess,mahak/vitess,mahak/vitess,tinyspeck/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,tinyspeck/vitess