docs(sass): automatically update sass vars json

scripts/docs/deploy.sh

@@ -22,6 +22,9 @@ function run {
   VERSION=$(readJsonProp "package.json" "version")
 
   gulp docs --doc-version="$VERSION_NAME"
+
+  sassvars()
+
   cd $SITE_DIR
 
   CHANGES=$(git status --porcelain)
@@ -40,4 +43,9 @@ function run {
 
 }
 
+function sassvars {
+  gulp docs.sass-variables
+  cp tmp/sass.json $SITE_DIR/docs/v2/theming/overriding-ionic-variables/
+}
+
 source $(dirname $0)/../utils.sh.inc