node.js - Connection refused to Firebase database

Question

This is the code I'm trying to run to connect to my database. I don't fully get the way to connect so I'm sure I'm making a big mistake here, or I'm missing something important:

let express = require("express");
let app = express();
let cors = require("cors");
let bodyParser = require("body-parser");
let logger = require("morgan");
let helmet = require("helmet");
var firebase = require("firebase-admin");
require("firebase/database")

app.use(logger("dev"));
app.use(
  bodyParser.urlencoded({
    extended: false,
  })
);
app.use(bodyParser.json());
app.use(cors());
logger("tiny");
app.use(helmet());

const serviceAccount = require("./keys.json");

let config = {
  credential: firebase.credential.cert(serviceAccount),
  databaseURL: "https://<MY_APP>.firebasedatabase.app",
};


firebase.initializeApp(config);

let db = firebase.database();

app.get("/", (req, res) => {
    db.ref().once("value")
    .then(function(snapshot) {
        console.log(snapshot.val())
    })
})

app.listen(5000, function () {
  console.log("Listened on port 5000!");
});

when I go to localhost:5000 I get the error ERR_CONNECTION_REFUSED and I wonder what it is that I a missing

question from:https://stackoverflow.com/questions/65860573/connection-refused-to-firebase-database

Answer 1

Waitting for answers