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Issue description

The command lab start custom-lab generates a Containerfile with a reference to a non-existent nodejs image and there is no reference/guidance in the solution to fix this.

Steps to reproduce:

lab start custom-lab

cd /home/student/DO188/labs/custom-lab

podman build .

Workaround:

Change the line:
FROM registry.ocp4.example.com:8443/ubi9/nodejs-22:1

to:
FROM registry.ocp4.example.com:8443/ubi9/nodejs-18:1

Expected result:

The base image should be pulled or the Lab Instructions should state that the user should replace the image to something that is available in the lab registry (by using podman search, for example)