What does it mean to run zkNode without the zkProver?

[pathak-ashutosh]

I was going through the "Setup Local zkNode" section in the Developer Guides and came across the following line: If you are unable to meet the Prover requirements, you can still run the zkNode. I have a few questions related to this:

1. What does it actually mean? Are zkNode and zkProver separately executable?
2. Can I run zkNode without the zkProver locally (considering I don't have the resources to run a zkProver on my system)?
3. When I execute the 'make run' command in the zkNode directory, is it running without the zkProver?
4. If it is, I still see a zk-prover docker container created. What's that for?

Sorry for asking so many questions in the same thread, I am quite confused.