Added multiple CPU docker build

Author: LaurentGoderre

test-build.sh

@@ -32,7 +32,7 @@ function build () {
 
   info "Building $full_tag..."
 
-  if ! docker build -t node:"$full_tag" "$path"; then
+  if ! docker build --cpuset-cpus="0,1" -t node:"$full_tag" "$path"; then
     fatal "Build of $full_tag failed!"
   fi
   info "Build of $full_tag succeeded."