Please help me to deploy Docker app onto heroku, Steps in the documentation don't work?

You have to specify the docker image name that you are pushing. i.e. ~/heroku/bin/heroku container:push web --app code--tube

note: if your project isn't a web application then give the docker image the correct process type, i.e. (web, worker, image, etc)

As a side note, it isn't a good idea to give read, write, execute permissions to all users. You should only give permissions to those who need it. Giving too many permissions can also cause problems in some applications or files that will make things stop working.

add -a to your heroku command