[Feature Request] Add support for RHEL9-based Docker images #280
Description
Is your feature request related to a problem? Please describe.
Alpine-based images used in Temporal Docker builds pose challenges in enterprise environments — especially due to musl-based libc, limited debugging tools, and slower CVE patch visibility.
Describe the solution you'd like
Add support for RHEL9 (UBI9) as an alternate base image for Temporal Docker builds. This enables:
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Better glibc compatibility
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Easier debugging with full toolchain support
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Cleaner CVE tracking (via Red Hat's patching cadence)
Additional context
We've successfully tested schema setup, service health checks, and CLI interactions with a RHEL9-based image locally.
This would improve compatibility in enterprise and compliance-focused environments.