Simple executable failure Ventura M!

While having trouble with a more complicated scenario, I tried to build a simple image and run it.

Followed this example exactly: How to Create Your Own Docker Base Images From "Scratch"

helloworld runs directly in the command line.

.helloworld is in the image

this is the erro when trying docker runr:

docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: “helloworld”: executable file not found in $PATH: unknown

I have read every search result. Please help me understand this

Thanks in advance.