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Johnathan Corgan
32a3b58d1f
The sidecar entrypoint hardcoded `udp.mtu: 1472`, the Docker-bridge IPv4 maximum (1500 MTU - 8 UDP - 20 IPv4 header). Promote it to `FIPS_UDP_MTU` (defaulting to 1472, preserving behavior) so non-Docker reuses of the example can override without editing the script. Plumb the env var through `docker-compose.yml` so a host-level setting reaches the container, and add a row to the README's env-var table. Also annotate the static-CI node template with a comment explaining the same 1472 rationale and the daemon's 1280 default. The template keeps 1472 as the literal value since the CI suite runs on a Docker bridge where that's correct. No behavior change unless the host explicitly sets FIPS_UDP_MTU.