feat: add more apps

src/content/docs/applications/roundcube.mdx

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+---
+title: Roundcube
+description: Roundcube Webmail is a browser-based multilingual IMAP client with an application-like user interface.
+hero:
+  tagline: Roundcube Webmail is a browser-based multilingual IMAP client with an application-like user interface.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/roundcube.webp
+  actions:
+    - text: Source
+      link: https://github.com/roundcube/roundcubemail
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/roundcube
+      icon: right-arrow
+---

src/content/docs/applications/rybbit.mdx

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+---
+title: Rybbit
+description: Rybbit - open-source and privacy-friendly alternative to Google Analytics that is 10x more intuitive.
+hero:
+  tagline: Rybbit - open-source and privacy-friendly alternative to Google Analytics that is 10x more intuitive.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/rybbit.webp
+  actions:
+    - text: Source
+      link: https://github.com/rybbit-io/rybbit
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/rybbit
+      icon: right-arrow
+---

src/content/docs/applications/s3-exporter.mdx

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+---
+title: S3 Exporter
+description: S3 bucket exporter exposing metrics size and number of objects.
+hero:
+  tagline: S3 bucket exporter exposing metrics size and number of objects.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/amazon-s3.webp
+  actions:
+    - text: Source
+      link: https://github.com/molu8bits/s3bucket_exporter
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/s3-exporter
+      icon: right-arrow
+---