feat(auth): add Authentik OIDC adapter

Refs #96

apps/gateway/src/main.ts

@@ -12,6 +12,15 @@ async function bootstrap(): Promise<void> {
     throw new Error('BETTER_AUTH_SECRET is required');
   }
 
+  if (
+    process.env['AUTHENTIK_CLIENT_ID'] &&
+    (!process.env['AUTHENTIK_CLIENT_SECRET'] || !process.env['AUTHENTIK_ISSUER'])
+  ) {
+    console.warn(
+      '[warn] AUTHENTIK_CLIENT_ID is set but AUTHENTIK_CLIENT_SECRET or AUTHENTIK_ISSUER is missing — Authentik SSO will not work',
+    );
+  }
+
   const logger = new Logger('Bootstrap');
   const app = await NestFactory.create<NestFastifyApplication>(
     AppModule,