Update app.py

app.py

@@ -3,10 +3,8 @@ import os
 os.system("git clone https://github.com/gradio-app/gradio.git gradio")
 os.system("cd gradio && git fetch && git checkout flagging-spaces")
 os.system("pip uninstall -y gradio")
-os.system("pip install -e gradio")
-os.system("cd gradio/frontend")
-os.system("npm install")
-os.system("npm run build")
+os.system("cd gradio && pip install -e .")
+os.system("cd gradio/frontend && npm install && npm run build")
 ### Real code is below
 ### -------------------------
 import gradio as gr