feat(docker): making the RHEL8 openshift-build-config-friendly

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/Jenkinsfile-GitLab-Docker

@@ -241,9 +241,10 @@ pipeline {
                   }
                   myShCmd('sudo podman image prune --force', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
                   // Copy the RHEL Host certificates for building
-                  myShCmd('mkdir -p tmp/ca tmp/entitlement', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
-                  myShCmd('cp /etc/pki/entitlement/*pem tmp/entitlement', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
-                  myShCmd('sudo cp /etc/rhsm/ca/redhat-uep.pem tmp/ca', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
+                  myShCmd('mkdir -p ./etc-pki-entitlement ./rhsm-conf ./rhsm-ca', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
+                  myShCmd('cp /etc/pki/entitlement/*pem ./etc-pki-entitlement', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
+                  myShCmd('sudo cp /etc/rhsm/rhsm.conf ./rhsm-conf', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
+                  myShCmd('sudo cp /etc/rhsm/ca/*pem ./rhsm-ca', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
                   myShCmd('sudo podman build --no-cache --target oai-udr --tag oai-udr:' + udr_tag + ' --file docker/Dockerfile.udr.rhel8 --build-arg NEEDED_GIT_PROXY="http://proxy.eurecom.fr:8080" . > archives/udr_podman_image_build.log 2>&1', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
                   myShCmd('sudo podman image ls >> archives/udr_podman_image_build.log', rem_rhel_host_flag, rem_rhel_host_user, rem_rhel_host)
                   if ("MERGE".equals(env.gitlabActionType)) {

docker/Dockerfile.udr.rhel8

@@ -32,8 +32,12 @@ FROM registry.access.redhat.com/ubi8/ubi:latest AS oai-udr-builder
 
 ARG NEEDED_GIT_PROXY
 
-COPY tmp/ca/redhat-uep.pem /etc/rhsm/ca
-COPY tmp/entitlement/*.pem /etc/pki/entitlement
+# Copy the entitlements
+COPY ./etc-pki-entitlement /etc/pki/entitlement
+
+# Copy the subscription manager configurations
+COPY ./rhsm-conf /etc/rhsm
+COPY ./rhsm-ca /etc/rhsm/ca
 
 RUN rm -f /etc/rhsm-host && \
     yum repolist --disablerepo=* && \