fix: use shell script for Railway startup

railway.json

@@ -5,7 +5,7 @@
     "dockerfilePath": "Dockerfile"
   },
   "deploy": {
-    "startCommand": "cd /flask && ls -la assets*.json && gunicorn -w 2 -b 0.0.0.0:8000 --timeout 120 main:app",
+    "startCommand": "/flask/start.sh",
     "restartPolicyType": "ON_FAILURE",
     "restartPolicyMaxRetries": 10
   }

start.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+cd /flask
+echo "Working directory: $(pwd)"
+echo "Checking assets files:"
+ls -la assets*.json 2>&1 || echo "No assets files found"
+echo "Starting gunicorn..."
+exec gunicorn -w 2 -b 0.0.0.0:8000 --timeout 120 main:app