Replace iPerf with Netperf in Container-Based Approach

Description
We need to replace our iPerf/iPerf3 usage with Netperf in the containerized workflow. This includes adding a new Docker image for Netperf, adjusting the Makefile to run Netperf-based tests, and updating container-installer.sh so it can install or pull the Netperf container.

Tasks

1. Add a Docker Image for Netperf

   • Create a Dockerfile (similar to our fio or stress-ng Dockerfiles) that installs Netperf on Alpine.
   • Ensure the container can act as both Netperf server (netserver) and client (netperf).

2. Update container-installer.sh

   • Remove any references to iPerf/iPerf3.
   • Add logic to build or pull the Netperf container.
   • Verify that Netperf is recognized as part of the container-based toolset.

3. Refactor the Makefile (inside containerization/)

   • Remove iPerf references and targets.
   • Create new Netperf targets for server/client.
   • Integrate Netperf thresholds (500 Mb/s, 1000 Mb/s, 2000 Mb/s) or other parameters to match our testing methodology.

4. Revise the “Container-Based Approach” Section

   • Update documentation to reflect that Netperf, not iPerf, is now used for network throughput tests in containers.
   • Highlight how to run the Netperf server container vs. Netperf client container.