create new envVer load

packages/app/src/server/service/config-loader.ts

@@ -622,6 +622,12 @@ const ENV_VAR_NAME_TO_CONFIG_INFO = {
     type: ValueType.NUMBER,
     default: 8,
   },
+  ACTIVITY_EXPIRATION_SECONDS: {
+    ns: 'crowi',
+    key: 'app:activityExpirationSeconds',
+    type: ValueType.NUMBER,
+    default: null,
+  },
 };