feat: add more apps

src/content/docs/applications/postiz.mdx

@@ -0,0 +1,15 @@
+---
+title: Postiz
+description: Postiz offers everything you need to manage your social media posts, build an audience, capture leads, and grow your business.
+hero:
+  tagline: Postiz offers everything you need to manage your social media posts, build an audience, capture leads, and grow your business.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/postiz.webp
+  actions:
+    - text: Source
+      link: https://github.com/gitroomhq/postiz-app
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/postiz
+      icon: right-arrow
+---