Apply best docker practices

Author: atheo89

rstudio/c9s-python-3.12/install_packages.R

@@ -12,7 +12,6 @@ if (!requireNamespace("remotes", quietly = TRUE)) {
     install.packages("remotes")
 }
 
-# Install specific versions of packages
 # Install specific versions of packages
 remotes::install_version('Rcpp',       '1.0.14', lib = lib, dependencies = TRUE, upgrade = "never")
 remotes::install_version('tidyverse',  '2.0.0',  lib = lib, dependencies = TRUE, upgrade = "never")

rstudio/rhel9-python-3.12/Dockerfile.cpu

@@ -5,6 +5,9 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
+# External image alias for UBI repository configuration
+FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
+
 ####################
 # cpu-base         #
 ####################
@@ -18,7 +21,7 @@ USER root
 # Inject the official UBI 9 repository configuration into the AIPCC base image.
 # The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
 # By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=registry.access.redhat.com/ubi9/ubi /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
+COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
 
 # upgrade first to avoid fixable vulnerabilities begin
 # Problem: The operation would result in removing the following protected packages: systemd

rstudio/rhel9-python-3.12/Dockerfile.cuda

@@ -5,6 +5,9 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
+# External image alias for UBI repository configuration
+FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
+
 ####################
 # cuda-base        #
 ####################
@@ -18,7 +21,7 @@ USER root
 # Inject the official UBI 9 repository configuration into the AIPCC base image.
 # The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
 # By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=registry.access.redhat.com/ubi9/ubi /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
+COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
 
 # upgrade first to avoid fixable vulnerabilities begin
 # Problem: The operation would result in removing the following protected packages: systemd