Added Support for Tainted Nodes

Only untainted nodes will be included in the storage check now.

Thanks @LS80!

Bug Fixes (including CVE)

What's Changed

• Fix usage of some environment variables by @thechristschn in #18
• fix: 🐛 Fixed CVE in protobuf by @ChrisHirsch in #24

New Contributors

• @thechristschn made their first contribution in #18

Full Changelog: https://github.com/ChrisHirsch/kuberhealthy-storage-check/commits/0.0.2