Tweaks before session.

data/workshop/exercise3.mdx

@@ -115,3 +115,5 @@ ssh -t -i disco_key ec2-user@$PREP_SYSTEM_IP "rsync -avP -e 'ssh -i disco_key' /
 |:-----------------------------------------------------------------------------:|
 | *Initiating the sneakernet transfer via rsync*                                |
 </Zoom>
+
+Once your transfer has finished pushing you are finished with exercise 3, well done! 🎉

data/workshop/exercise4.mdx

@@ -99,3 +99,4 @@ oc mirror --from=/mnt/high-side/mirror_seq1_000000.tar --dest-skip-tls docker://
 | *Running the oc mirror process to push content to our registry*               |
 </Zoom>
 
+Once your content has finished pushing you are finished with exercise 4, well done! 🎉

data/workshop/exercise5.mdx

@@ -133,13 +133,13 @@ networking:
 cat << EOF >> install-config.yaml
 imageContentSources:
   - mirrors:
-    - $(hostname)/ubi8/ubi
+    - $(hostname):8443/ubi8/ubi
     source: registry.redhat.io/ubi8/ubi
   - mirrors:
-    - $(hostname)/openshift/release-images
+    - $(hostname):8443/openshift/release-images
     source: quay.io/openshift-release-dev/ocp-release
   - mirrors:
-    - $(hostname)/openshift/release
+    - $(hostname):8443/openshift/release
     source: quay.io/openshift-release-dev/ocp-v4.0-art-dev
 EOF
 ```