<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#42226
When doing dev in a remote environment, like a public cloud VM, don't
expose ports to the public.
This is a contributor security improvement.
The localstack fail is present on main, and was not caused by this
change:
https://github.com/fleetdm/fleet/actions/runs/23439965808/job/68187858627
# Checklist for submitter
## Testing
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Docker Compose configuration updated across multiple services (Redis,
MySQL, mail, monitoring, and storage services) to restrict port bindings
to localhost only instead of all network interfaces.
* Documentation Docker Compose examples updated to reflect
localhost-only port binding for core services.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Redis 5 has been EOL for a few years, and didn't get updates for the
latest high-severity CVEs. We're already using 6 in most places
(fleetctl preview, recommended reference architectures, managed cloud
environments) so it's safe to set 6 as the new minimum.
Co-authored-by: Noah Talerman <47070608+noahtalerman@users.noreply.github.com>
