add APP_SITE_URL

src/server/service/config-loader.js

@@ -110,6 +110,12 @@ const ENV_VAR_NAME_TO_CONFIG_INFO = {
   //   type:    ,
   //   default:
   // },
+  APP_SITE_URL: {
+    ns:      'crowi',
+    key:     'app:siteUrl',
+    type:    TYPES.STRING,
+    default: null
+  },
   SAML_USES_ONLY_ENV_VARS_FOR_SOME_OPTIONS: {
     ns:      'crowi',
     key:     'security:passport-saml:useOnlyEnvVarsForSomeOptions',