add redis and cache

CloudronManifest.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "healthCheckPath": "/",
   "httpPort": 3000,
+  "memoryLimit": 1048576000,
   "addons": {
     "localstorage": {},
     "postgresql": {},
@@ -10,7 +11,8 @@
       "loginRedirectUri": "/api/oauth/openid",
       "logoutRedirectUri": "/",
       "tokenSignatureAlgorithm": "RS256"
-  }
+    },
+    "redis": { "noPassword": true }
   },
   "manifestVersion": 2
 }