Upgrade the Alpine version to 3.20.9 🙏

[cmaluend]

Hi,
We are running SigNoz in our cluster, and some Linux vulnerabilities have been reported for the Alpine version used by SigNoz (3.20.3).
Is it possible to upgrade to 3.20.9? It is a minor upgrade.
If not, I will try to create my own Docker image.

Thanks!

[H4ad]

There's few places that needs to be updated (ref), would you like to open a PR for that?

[cmaluend]

@H4ad PR has been created.