fix: change backend port to 3984, fix healthcheck with node http, relax frontend dependency

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

docker-compose.yml

@@ -10,16 +10,16 @@ services:
     environment:
       - REPLICATE_API_TOKEN=${REPLICATE_API_TOKEN}
       - FRONTEND_URL=${FRONTEND_URL:-http://localhost}
-      - PORT=3001
+      - PORT=3984
     volumes:
       # Persist model config across container restarts
       - iqai-models:/app/data
     healthcheck:
-      test: ["CMD", "wget", "-qO-", "http://localhost:3001/api/health"]
-      interval: 30s
+      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3984/api/health', r => process.exit(r.statusCode === 200 ? 0 : 1)).on('error', () => process.exit(1))"]
+      interval: 15s
       timeout: 10s
-      retries: 3
-      start_period: 10s
+      retries: 5
+      start_period: 15s
     networks:
       - iqai-net
 
@@ -33,7 +33,7 @@ services:
       - "${FRONTEND_PORT:-1984}:80"
     depends_on:
       backend:
-        condition: service_healthy
+        condition: service_started
     networks:
       - iqai-net