How to delete a record from your local/custom database in Node.js ?

const express = require('express')
const repo = require('./repository')
const showRecordTemplet = require('./showRecord')

const app = express()
const port = process.env.PORT || 3000

// Home page
app.get('/', async (req, res) => {
  const records = await repo.getAllRecords()
  res.send(showRecordTemplet(records))
})

// Post route to delete record
app.post('/delete/:id', async (req, res) => {
  const id = req.params.id
  const temp = await repo.delete(id)
  res.redirect('/')
})

// Server setup
app.listen(port, () => {
  console.log(`Server start on port ${port}`)
})

// Importing node.js file system, crypto module 
const fs = require('fs')

class Repository {

    constructor(filename) {

        // The filename where datas are
        // going to store
        if (!filename) {
            throw new Error(
'Filename is required to create a datastore!')
        }

        this.filename = filename

        try {
            fs.accessSync(this.filename)
        } catch (err) {

            // If file not exist it is created
            // with empty array
            fs.writeFileSync(this.filename, '[]')
        }
    }

    // Method to fetch all records
    async getAllRecords() {
        return JSON.parse(
            await fs.promises.readFile(this.filename, {
                encoding: 'utf8'
            })
        )
    }

    // Delete Method
    async delete(id) {

        // Read all file contents of 
        // the datastore
        const jsonRecords = await 
            fs.promises.readFile(this.filename, {
            encoding: 'utf8'
        })

        // Parsing json records in javascript
        // object type records
        const records = JSON.parse(jsonRecords)

        // Filter Records
        const filteredRecords = records.filter(
                    record => record.id !== id)

        // Write all records back to the 
        // custom database
        await fs.promises.writeFile(
            this.filename,
            JSON.stringify(filteredRecords, null, 2)
        )
    }
}

// The 'datastore.json' file created at runtime
// if it not exist, here we try to delete 
// information from database that means 
// database(datastore.json) already exist
// and there are also records in it.
module.exports = new Repository('datastore.json')

module.exports = records => {
  const displayRecordId = records.map(record => {
    return `
    <p>
      Record ID - <strong>${record.id}</strong>
      <form action='delete/${record.id}' method='POST'>
        <button>Delete Record</button>
      </form>
    </p> 
    `
  }).join('')

  return `
    <div>
      ${displayRecordId}
    </div>
  `
}