feat(fifa17-docker): OPENFUT_SERVERS component selection for staged Py->Rust migration

entrypoint.sh validates/selects among lsx blaze roster utas pow and skips
unselected responders (errors if none). docker-compose threads the env
through; .env.example documents it. Retained pre-existing WIP verified.

fifa17-recon/docker/fifa17-python/docker-compose.yml

@@ -36,10 +36,14 @@ services:
       FUT_PROFILE_ROOT: "/state/accounts"
       FUT_SETTINGS: "off"
       FUT_MODES: "1"
+      # Which Python responders this SERVER runs. Default excludes lsx (that is
+      # a client-side responder — see below). Drop a name once it is migrated to
+      # a Rust host (run outside Docker) so the two never overlap. See .env.example.
+      OPENFUT_SERVERS: "${OPENFUT_SERVERS:-blaze roster utas pow}"
     volumes:
       - "../state:/state"
     ports:
-      - "4216:4216"      # LSX (Origin bootstrap)
+      - "4216:4216"      # LSX — CLIENT-SIDE (.105); only used if lsx is enabled for all-on-one-box
       - "42127:42127"    # Blaze redirector (TLS)
       - "42130:42130"    # Blaze main
       - "42131:42131"    # Nucleus OAuth stub