How can I give permissions to specific folders on heroku?

How can I give permissions to specific folders on heroku?

php heroku permissions chmod

heroku

Linux. Heroku-Django. Collectstatic read-only file system

python linux django heroku chmod

heroku

Trying to run php file using "heroku run" and I get "bash permission denied" [closed]

php bash heroku chmod

heroku

Phoenix file copying on Heroku

heroku elixir file-permissions phoenix-framework chmod

heroku