data: listen on both Meshtastic UDP multicast groups by default (#903) (#909)

data/tools/compose.udp.pi.yml

@@ -15,8 +15,8 @@
 #      INGESTOR_NODE_ID to .env.
 #   4. docker compose up -d
 #
-# `network_mode: host` is REQUIRED — multicast (224.0.0.69) cannot reach a
-# bridged container.
+# `network_mode: host` is REQUIRED - multicast cannot reach a bridged
+# container.
 
 services:
   ingestor:
@@ -31,7 +31,7 @@ services:
       # distinguishes the primary channel from a secondary channel that shares
       # the default AQ== key. If unset, primary-only mode drops ALL traffic.
       PRIMARY_CHANNEL_NAME: ${PRIMARY_CHANNEL_NAME:-}
-      MESH_UDP_GROUP: ${MESH_UDP_GROUP:-224.0.0.69}
+      MESH_UDP_GROUP: ${MESH_UDP_GROUP:-239.0.0.69,224.0.0.69}
       MESH_UDP_PORT: ${MESH_UDP_PORT:-4403}
       INGESTOR_NODE_ID: ${INGESTOR_NODE_ID:-}
       API_TOKEN: ${API_TOKEN}