Fix security vulnerabilities

[mmalvik]

Currently the image groundnuty/k8s-wait-for:no-root-v2.0 has several security vulnerabilities.

Running the command docker scout cves groundnuty/k8s-wait-for:no-root-v2.0 list all of these.
Here is the summary at the end:

67 vulnerabilities found in 8 packages
  LOW       5
  MEDIUM    30
  HIGH      29
  CRITICAL  3

The Trivy scan for this repo has been failing for some time too:
https://github.com/groundnuty/k8s-wait-for/actions/workflows/trivy.yml 💥

I have not looked into this in depth, but maybe the older image of alpine is a part of this?
FROM alpine:3.16.2

[AnthonyDewhirst]

I too have come to this page because of the above.
Is the repo being maintained? Do you have alternatives now? (trying to find the KEP for this: kubernetes/kubernetes#106802)
When Trivy runs, a lot of the issues stem from Curl. Looking at the code, Curl is only used during image creation as far as I can tell. Couldn't we then just remove curl from the image? (haven't looked at all of the security details yet)