fix(docker): use host network mode for backend

Backend couldn't reach Tautulli (172.20.1.255) or Overseer
(172.20.1.225) from Docker bridge network. Switched to host
network mode so backend can access local network services.
Updated DATABASE_URL and REDIS_URL to use localhost.

docker-compose.yml

@@ -45,8 +45,8 @@ services:
       retries: 5
     environment:
       - NODE_ENV=production
-      - DATABASE_URL=postgresql://coop:coop_password@postgres:5432/coop_credits?schema=public
-      - REDIS_URL=redis://redis:6379
+      - DATABASE_URL=postgresql://coop:coop_password@localhost:5432/coop_credits?schema=public
+      - REDIS_URL=redis://localhost:6379
       - PORT=3002
       - JWT_SECRET=${JWT_SECRET}
       - SOLANA_RPC_URL=${SOLANA_RPC_URL:-https://api.devnet.solana.com}
@@ -60,15 +60,12 @@ services:
       - OVERSEER_URL=${OVERSEER_URL}
       - OVERSEER_API_KEY=${OVERSEER_API_KEY}
       - ENCRYPTION_KEY=${ENCRYPTION_KEY}
-    ports:
-      - "3002:3002"  # Exposed on all interfaces
+    network_mode: host
     depends_on:
       postgres:
         condition: service_healthy
       redis:
         condition: service_healthy
-    networks:
-      - coop-network
     restart: unless-stopped
 
   frontend: