To create a redirect on S3, use the AWS CLI to upload an empty file with the x-amz-website-redirect-location metadata key set.
First, create an empty file:
touch empty
Then upload that file to the origin of the redirect, and point it to the target with the --website-redirect flag:
aws s3 cp empty \ s3://jeffkreeftmeijer.com/.emacs.d/index.html \ --website-redirect=https://jeffkreeftmeijer.com/emacs-configuration \ --acl public-read