Observability

1. Get the list of nodes in JSON format and store it in a file.

2. Get CPU/memory utilization for nodes.

3. Create an nginx pod with a liveness probe that just runs the command ls. Check probe status.

4. Create an nginx pod (that includes port 80) with an HTTP readinessProbe on path '/' on port 80.

5. Use JSON PATH query to retrieve the osImages of all the nodes