support separate css files for light/dark themes.

pkg/api/dtos/index.go

@@ -8,11 +8,16 @@ type IndexViewData struct {
 	GoogleAnalyticsId  string
 	GoogleTagManagerId string
 
-	PluginCss    []string
+	PluginCss    []*PluginCss
 	PluginJs     []string
 	MainNavLinks []*NavLink
 }
 
+type PluginCss struct {
+	Light string `json:"light"`
+	Dark  string `json:"dark"`
+}
+
 type NavLink struct {
 	Text string `json:"text"`
 	Icon string `json:"icon"`