If you deployed to Docker a few times you may have to purge it to remove unncesery usage as old images will still remain on the service, and the storage for these old images can soon mount up in to many GB's.
You can clear these files from within Wappler itself. In the Terminal choices area, at the bottom of the Wappler interface, within your Docker Project you will see a little drop down that enables you to select SSH. Click on Host Server SSH and Wappler should connect to your Docker environment on AWS. Then you can use the commands in this thread to Purge them, which will take your file storage down on AWS. Explained here, with images too:
See if that helps drop the size, and therefore your associated costs.