Lower healthcheck interval

### Checklist

- [X] My issue is specific & actionable.
- [X] I am not suggesting a protocol enhancement.
- [X] I have searched on the [issue tracker](https://github.com/ipfs/kubo/issues?q=is%3Aissue) for my issue.

### Description

Could it be useful to lower the healthcheck interval?
From: `HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \`
To: `HEALTHCHECK --interval=5s --timeout=3s --start-period=5s --retries=20 \`

Rationale: If you have a service that has IPFS/Kubo as dependency, about 15/20s of boot time get added for every fresh deployment.

This is not an impactful case for production cases, but pre-production & CI cases might see some improvement. In my personal case, I've already seen that gain when using a modified version of Kubo with these settings.
I might be missing something, but I cannot see many drawbacks to have a high interval value, although this could be due to missing some deep internal elements of a DAG resolution at boot time.

PS: if required & desired, I could do the PR myself, although I guess first it's better to agree here about going forward with this change.

Best.