Find SHA here (tar.xz)
Update env vars in Dockerfile
Then build image and push it
# To list platforms available
docker buildx ls
docker buildx build --platform linux/amd64 -t prettotech/ruby-jemalloc:x.x.x .
docker login -u prettotech
> enter pw in 1password
docker push prettotech/ruby-jemalloc:x.x.x