add dex local oidc compose

backend/modules/auth/oidc.js

@@ -7,7 +7,7 @@ const key = 'oidc';
 export function getModuleConfig() {
     const config = getConfig();
     return {
-        title: 'FedID',
+        title: process.env.OIDC_BUTTON_LABEL || 'FedID',
         icon: 'login',
         issuer: process.env.OIDC_ISSUER,
         authorizationURL: process.env.OIDC_AUTHORIZATION_URL,