Set server runtime port to 9999

[Copilot]

This updates the server to run on port 9999 instead of the previous default. The change ensures the app binds to the required port consistently in startup logs and rendered status output.

• Port configuration

  • Updated the server port constant in index.js from 1245 to 9999.

• Behavioral impact

  • app.listen(...) now binds to 9999.
  • User-facing status text that references the running port now reflects 9999 via the shared port variable.

const port = 9999;
app.listen(port, () => console.log(`Example app listening on port ${port}!`));