[Chapel Merge] Updating Dockerfile and README

Branch: refs/heads/release/1.24
Revision: 1313826
Author: Maxrimus
Log Message:

Merge pull request #17571 from Maxrimus/release/1.24

Updating Dockerfile and README

[reviewed by @ronawho ]

Modified Files:
M util/dockerfiles/Dockerfile

M util/dockerfiles/README.md

Compare: https://github.com/chapel-lang/chapel/compare/e53715d684c9...1313826994a0