deploy: move backend host port to 18000 to avoid 8000 conflict

.gitea/workflows/deploy.yml

@@ -60,7 +60,7 @@ jobs:
         run: |
           echo "Waiting for backend to be healthy..."
           for i in $(seq 1 30); do
-            if curl -sf http://127.0.0.1:8000/api/v1/utils/health-check/ > /dev/null 2>&1; then
+            if curl -sf http://127.0.0.1:18000/api/v1/utils/health-check/ > /dev/null 2>&1; then
               echo "✅ Backend is healthy!"
               exit 0
             fi