fix: dashboard uses detected docker_gwbridge gateway instead of GATEWAY_IP

The dashboard nginx proxy was using GATEWAY_IP (10.42.24.1) to reach the
API, which is only reachable when the AP is running.  Switch to
DOCKER_HOST_GW which points to the docker_gwbridge gateway — always
reachable from Swarm containers regardless of network mode.

Detection: docker network inspect docker_gwbridge at deploy time.
Fallback: 172.16.1.1 (Docker's typical default).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: papadopouloskyriakos

cubeos-dashboard/appconfig/docker-compose.yml

@@ -18,8 +18,10 @@ services:
         mode: host
     environment:
       - TZ=${TZ:-UTC}
-      - API_URL=http://${GATEWAY_IP:-10.42.24.1}:6010
-      - DOCS_URL=http://${GATEWAY_IP:-10.42.24.1}:6032
+      # Use docker_gwbridge gateway — always reachable from Swarm containers
+      # regardless of network mode (AP up/down, wifi_client, eth_client, etc.)
+      - API_URL=http://${DOCKER_HOST_GW:-172.16.1.1}:${API_PORT:-6010}
+      - DOCS_URL=http://${DOCKER_HOST_GW:-172.16.1.1}:${DOCS_INDEXER_PORT:-6032}
     env_file:
       - /cubeos/config/defaults.env
     deploy:

defaults.env

@@ -14,6 +14,7 @@ CUBEOS_COUNTRY_CODE=NL
 # Network Configuration
 # ===================
 GATEWAY_IP=10.42.24.1
+DOCKER_HOST_GW=172.16.1.1
 SUBNET=10.42.24.0/24
 DHCP_RANGE_START=10.42.24.10
 DHCP_RANGE_END=10.42.24.250

scripts/ci-restart.sh

@@ -107,6 +107,18 @@ if [ -f /cubeos/config/defaults.env ]; then
   echo "Sourced defaults.env (GATEWAY_IP=${GATEWAY_IP:-not set})"
 fi
 
+# --- Detect docker_gwbridge gateway (runtime override) ---
+# docker_gwbridge subnet is assigned by Docker at Swarm init — not predictable.
+# Detect the actual gateway IP so compose files can route to host services.
+DETECTED_GW=$(docker network inspect docker_gwbridge \
+  --format '{{(index .IPAM.Config 0).Gateway}}' 2>/dev/null) || true
+if [ -n "$DETECTED_GW" ]; then
+  export DOCKER_HOST_GW="$DETECTED_GW"
+  echo "Docker host gateway (detected): ${DOCKER_HOST_GW}"
+else
+  echo "Docker host gateway (fallback): ${DOCKER_HOST_GW:-172.16.1.1}"
+fi
+
 # --- Deploy COMPOSE apps ---
 for app in $COMPOSE_APPS; do
   COMPOSE_FILE="/cubeos/coreapps/${app}/appconfig/docker-compose.yml"