A very serious gist

1970.html

html
  head
    title= title
  body
    h1= 1970
    p Music was awful.

1980.html

html
  head
    title= title
  body
    h1= 1980
    p NEVER GOING TO GIVE YOU UP.

index.js

const express = require('express')
const pug = require('pug')
const app = express()

// Takes `data` and plugs it into a `templateName.html` to render it
// It's pug template
function getMarkup(templateName, data) {
    pug.compileFile('./' + templateName + '.html')(data)
}

// Route at /
app.get('/', (req, res) => {
    // We check for two query parameters
    
    // Year: ?year=...
    let year = req.query.year || 1970;

    // WordPress Query String: ?wp=...
    let wp = req.query.wp;

    // Log it out debug
    console.log(year, wp, req, res);


    // Get the markup from getMarkup
    // then send it out in a response
    res.send(getMarkup(year.toString() ,{}));
})

// Start that app at localhost:3000
app.listen(3000, () => console.log('Example app listening on port 3000!'))

package.json

{
  "name": "fur_leo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.16.3",
    "pug": "^2.0.3"
  }
}

I put this in the public domain.