How to see files and file structure on a deployed Heroku app

I can do with this commands

heroku login
heroku run bash -a APPNAME
$ cd app

APPNAME is the name of your Heroku application And in the folder app are your files.

When you finish your commands and want to return to your terminal you can write

$ exit

Terminal access is now provided by clicking a link "More" on the top right of the Heroku dashboard where you can select "run console". This presents an option to run terminal commands and shows a default of 'bash'. However, you do have to explicitly enter 'bash' or other command. If you edit files, you will have to manage synchronization back to your development code using Git.

As in @Juliano Araújo's answer but from a project folder connected via git you can just run heroku run bash