- Docker should be installed. This is covered in the Docker Tutorial.
- You should have one of my rails-general Docker images installed. This is covered in the Docker Tutorial.
- You should be familiar with the process of creating a new Rails app. This is covered in the GenericApp Tutorial.
This document shows how to give users the option of adding a profile picture.
Not all apps require this feature. Storing the profile pictures uses up disk space, which may be an issue if your app has a sufficiently large number of apps or if your production environment (such as a free Heroku account) gives you only a small amount of disk space. Storing profile pictures in the cloud is an option, but the free deal from AWS expires after a year.