Purge CloudFlare cache on deploy

cloudflare.json

{
  "email": "me@email.com",
  "zone": "CLOUDFLARE_ZONE",
  "token": "CLOUDFLARE_TOKEN"
}

get zone ID

curl -X GET "https://api.cloudflare.com/client/v4/zones" \
    -H "X-Auth-Email: user@example.com" \
    -H "X-Auth-Key: c2547eb745079dac9320b638f5e225cf483cc5cfdda41" \
    -H "Content-Type: application/json"

gulpfile.js

var gulp = require('gulp')
var request = require('request')

gulp.task('purge-cache', function () {
  var cf = require('./cloudflare.json')

  request({
    url: 'https://api.cloudflare.com/client/v4/zones/' + cf.zone + '/purge_cache',
    method: 'DELETE',
    headers: {
      'X-AUTH-EMAIL': cf.email,
      'X-Auth-Key': cf.token,
      'Content-Type': 'application/json'
    },
    body: {
      "files":["http://cdn.mykamva.ir/optimised.js"],
    },
    json: true
  }, function (err, response, body) {
    if (err) {
      throw err
    }

    console.log('CloudFlare cache purge response')
    console.log(body)
  })
})