Update app.py

app.py

@@ -41,9 +41,7 @@ def setup():
     print("Updating Node...")
     version = "20"
     subprocess.run("curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash", shell=True, check=True)
-    subprocess.run("\. $HOME/.nvm/nvm.sh", shell=True, check=True)
-    subprocess.run(["nvm", "install", version], check=True)
-    subprocess.run(["nvm", "use", version], check=True)
+    subprocess.run(f"\. $HOME/.nvm/nvm.sh && nvm install {version} && nvm use {version}", shell=True, check=True)
     print(f"Node.js updated to version: {version}")