express "middleware" after request handling

example.js

const express = require("express");
const app = express();
app.use((req, res, next) => {
  res.once("finish", () => {
    console.log("finish");
  });
  next();
});
app.get("/", (req, res) => {
  console.log("in get");
  res.json({ foo: "bar" });
});
app.listen(8777);