No CSS and JS files when deploying with Heroku

I'm trying to deploy my project to heroku, but I faced a problem: there is no CSS and JS in deployed site. When I open page source of deployed site, for example here is next script in page source:

<script type="text/javascript"
        src="/static/static/scripts/validation.js">

When I go to src link, it shows internal error. I guess that if my scripts were saved somewhere in Inet and src would be a link to it, then it would work correct. But when deploying my site, all my scripts and CSSare in static folder. When run site locally, it's okay, when through heroku, it can't see CSS and scripts. Is there any solution for it?