diff --git a/config.py b/config.py
index 7a5f147..4ac8ddc 100644
--- a/config.py
+++ b/config.py
@@ -1,26 +1,51 @@
 import os
 import time
 from datetime import datetime, date, timedelta
+from urllib.parse import urlparse
+
 # PARAMETERS
 CONFIGS = {
-    "SECRET_KEY": os.urandom(30), # Set the secret key for session authentication
-    "PERMANENT_SESSION_LIFETIME": timedelta(minutes=60)   
+    "SECRET_KEY": os.environ.get("SECRET_KEY", os.urandom(30).hex()), # Set the secret key for session authentication
+    "PERMANENT_SESSION_LIFETIME": timedelta(minutes=60)
 }
-SQL_CONFIG = dict(
+
+# PostgreSQL config - support both Railway and local Docker
+DATABASE_URL = os.environ.get('DATABASE_URL')
+if DATABASE_URL:
+    # Railway provides DATABASE_URL
+    url = urlparse(DATABASE_URL)
+    SQL_CONFIG = dict(
+        database=url.path[1:],
+        user=url.username,
+        host=url.hostname,
+        port=url.port or 5432,
+        password=url.password
+    )
+else:
+    # Local Docker fallback
+    SQL_CONFIG = dict(
         database="portfolio_platform",
         user="postgres",
         host="db",
         port="5432",
         password="thiispassword1qaz!QAZ"
-)
-CACHE_CONFIG = {
+    )
+
+# Redis config - support both Railway and local Docker
+REDIS_URL = os.environ.get('REDIS_URL')
+if REDIS_URL:
+    # Railway provides REDIS_URL
+    CACHE_CONFIG = {
+        'CACHE_TYPE': 'redis',
+        'CACHE_REDIS_URL': REDIS_URL,
+    }
+else:
+    # Local Docker fallback
+    CACHE_CONFIG = {
         'CACHE_TYPE': 'redis',
-        # 'CACHE_REDIS_USER': 'default',
         'CACHE_REDIS_HOST': 'redis',
         'CACHE_REDIS_PORT': 6379,
-        # 'CACHE_REDIS_PASSWORD': '5rP99RevPMW94rswBXAL',
-        # 'CACHE_KEY_PREFIX': 'railway_redis_'
-}
+    }
 role_map = dict(max_sharpe='最大化夏普比率',
                 max_sortino='最大化索提諾比率', 
                 min_volatility='最小化波動率', 
diff --git a/nixpacks.toml b/nixpacks.toml
new file mode 100644
index 0000000..1f8d30b
--- /dev/null
+++ b/nixpacks.toml
@@ -0,0 +1,8 @@
+[phases.setup]
+nixPkgs = ['python39']
+
+[phases.install]
+cmds = ['pip install -r requirements.txt']
+
+[start]
+cmd = 'gunicorn -w 2 -b 0.0.0.0:$PORT --timeout 120 main:app'