Modify the volume for your EC2 instance to 50G
Be sure to tag the EC2 instance and the volume as a "Cloud9" volume so that you remember to retain it.
After the modification is complete, see the following instructions on how to claim that space from your instance: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html
IDE Display: Code on Top, Terminal on Bottom, Running DSpace Docker
Look at the EC2 screen to get the DNS for your instance
DSpace App Running in Docker
Get the public IP from the EC2 Instance Dashboard. Add port 8080
Close all browser tabs that are accessing the instance in order to ensure that the shutdown takes place. The EC2 instance will be in a stopped state. If you wish to re-use this environment, do not terminate the EC2 instance and do not delete the associated volume.
With the automatic shutdown setting, I have found the daily costs of maintaining this environment to be less that $1 / day. Carefully track costs if you do not destroy the EC2 instance and the associated volume.