docs: add description frontmatter to content pages for SEO (#11654)

apps/docs/content/examples/secure-api/go.mdx

@@ -1,5 +1,6 @@
 ---
 title: ZITADEL with Go
+description: "Secure Go APIs using OAuth 2.0 Token Introspection with ZITADEL and role-based authorization."
 sidebar_label: Go
 ---
 

apps/docs/content/examples/secure-api/java-spring.mdx

@@ -1,5 +1,6 @@
 ---
 title: ZITADEL with Java Spring Boot
+description: "Secure Java Spring Boot APIs using OAuth 2.0 Token Introspection with ZITADEL."
 sidebar_label: Java Spring Boot
 ---
 

apps/docs/content/examples/secure-api/nodejs-nestjs.mdx

@@ -1,9 +1,10 @@
 ---
 title: ZITADEL with Node.js
+description: "Secure Node.js APIs in NestJS by validating access tokens with ZITADEL's introspection endpoint."
 sidebar_label: NestJS
 ---
 
-# ZITADEL with Node.js (NestJS)
+## ZITADEL with Node.js (NestJS)
 
 This documentation section guides you through the process of integrating ZITADEL into your Node.js backend using the NestJS framework. The provided example demonstrates authentication using an OIDC (OAuth2) token introspection strategy with a ZITADEL service account for machine-to-machine communication.
 

apps/docs/content/examples/secure-api/pylon.mdx

@@ -1,5 +1,6 @@
 ---
 title: ZITADEL with Pylon
+description: "Integrate ZITADEL with Pylon services by validating tokens and checking permissions for secure API endpoints"
 sidebar_label: Pylon
 ---
 

apps/docs/content/examples/secure-api/python-django.mdx

@@ -1,5 +1,6 @@
 ---
 title: ZITADEL with Django Python
+description: "Integrate ZITADEL with Django Python to validate tokens and check permissions for secure API access using OIDC protocol standards"
 sidebar_label: Django
 ---
 

apps/docs/content/examples/secure-api/python-flask.mdx

@@ -1,5 +1,6 @@
 ---
 title: ZITADEL with Python
+description: "Secure Python Flask APIs with ZITADEL token validation and role-based access control."
 sidebar_label: Python
 ---