replace static file and add timestamp for cached in layout html

command

sed -ri \"s/myjs\.js([^\"]+|)\"/min.js?$(date +%s)\"/g" ./mylayout.twig
#replace this
<script src="/myjs.js"></script>
or
<script src="/myjs.js?1487206735"></script>

with this
<script src="/myjs.js?2348392493284932"></script>

package.json

{
  "name": "My Site",
  "version": "1.0.0",
  "description": "test",
  "scripts": {
    "js":"NODE_ENV=production webpack -p",
    "postjs":"sed -ri \"s/myjs\\.js([^\\\"]+|)\\\"/myjs.js?$(date +%s)\\\"/g\" ./mylayout.twig",
  }
}