Documented the theming part a bit better

README.md

@@ -83,6 +83,8 @@ port = 10001
 
 [theme]
 # colors specified in hex (or valid css names) which determine the theme of the lieu instance
+# NOTE: If (and only if) all three values are set lieu uses those to generate the file html/assets/theme.css at startup.
+# You can also write directly to that file istead of adding this section to your configuration file
 foreground = "#ffffff"
 background = "#000000"
 links = "#ffffff"

server/server.go

@@ -240,14 +240,15 @@ func (h RequestHandler) renderView(res http.ResponseWriter, tmpl string, view *T
 func WriteTheme(config types.Config) {
 	theme := config.Theme
 	// no theme is set, use the default
-	if theme.Foreground == "" {
+	if theme.Foreground == "" || theme.Background == "" || theme.Links =="" {
 		return
 	}
-	colors := fmt.Sprintf(`:root {
+	colors := fmt.Sprintf(`/*This file will be automatically regenerated by lieu on startup if the theme colors are set in the configuration file*/
+:root {
   --primary: %s;
   --secondary: %s;
   --link: %s;
-}\n`, theme.Foreground, theme.Background, theme.Links)
+}`, theme.Foreground, theme.Background, theme.Links)
 	err := os.WriteFile("html/assets/theme.css", []byte(colors), 0644)
 	util.Check(err)
 }