Recreated dockerproxy network with --ip-range 172.18.0.128/25 so Docker
auto-allocations are isolated from the .2-.127 static reservation block.
Eliminates IP-collision class that caused the 2026-05-17 Traefik outage.
Adds 13-DOCKERPROXY-NETWORK.md as the canonical reference for the
network spec, recreate command, and current IP assignments.
jazzymc