Express Compress not working in Node website - node.js

Question

I've my site built on node + express, and trying to enable gzip compression using this tutorial but it didn't worked as shown in the tutorial. I can't see Content-Encoding in response header.
Here is my code.
const compression = require('compression');
const express = require("express");
const path = require("path");
var redirects = require('express-seo-redirects');
var proxy = require('express-http-proxy');
require('dotenv').config()
/**
* App Variables
*/
const app = express();
app.use(compression({ filter: shouldCompress, threshold: 0 }));
//app.use(compression()) - //I've also tried this.
function shouldCompress (req, res) {
if (req.headers['x-no-compression']) {
// don't compress responses with this request header
return false
}
// fallback to standard filter function
return compression.filter(req, res)
}
let setCache = function (req, res, next) {
// here you can define period in second, this one is 1 day
const period = 1 * 24 * 60 * 60 * 1000
// you only want to cache for GET requests
if (req.method == 'GET') {
res.set('Cache-control', `public, max-age=${period}`)
} else {
// for the other requests set strict no caching parameters
res.set('Cache-control', `no-store`)
}
// res.set('Content-Encoding', 'gzip')
// remember to call next() to pass on the request
next()
}
app.use(setCache)
And when I use res.set('Content-Encoding', 'gzip') inside app.get("/", (req, res) => { then it shows in response header but website stop working (not showing any error other than blank screen).
Bellow images are of my rest code.

Answer 1

Gzip compression was showing only for resource files (css, js etc..). So I resolved it by adding res.contentType('text/html'); in setCache function.
const exceptions = ['.js', '.css', '.ico', '.jpg', '.jpeg', '.png', '.gif', '.tiff', '.tif', '.bmp', '.svg', '.ttf', '.eot', '.woff', '.php', '.xml', '.xsl'];
let setCache = function (req, res, next) {
// here you can define period in second, this one is 5 minutes
const period = 1 * 24 * 60 * 60 * 1000;
if(!exceptions.some(v => req.url.includes(v))){
res.contentType('text/html');
}
// you only want to cache for GET requests
if (req.method == 'GET') {
res.set('Cache-control', `public, max-age=${period}`)
} else {
// for the other requests set strict no caching parameters
res.set('Cache-control', `no-store`)
}
// res.set('Content-Encoding', 'gzip')
// remember to call next() to pass on the request
next()
}
app.use(setCache)