code: def setup(app):
      app.add_js_file("js/script.js")
      app.add_css_file("css/styles.css")
      app.add_css_file("css/dark.css")
      app.add_css_file("css/light.css")
  
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) without return types