feat: add more apps

src/content/docs/applications/kubelet-serving-cert-approver.mdx

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+---
+title: Kubelet Serving Certificate Approver
+description: Kubelet Serving Certificate Approver is a custom approving controller which approves kubernetes.io/kubelet-serving Certificate Signing Request that kubelet use to serve TLS endpoints.
+hero:
+  tagline: Kubelet Serving Certificate Approver is a custom approving controller which approves kubernetes.io/kubelet-serving Certificate Signing Request that kubelet use to serve TLS endpoints.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/kubernetes.webp
+  actions:
+    - text: Source
+      link: https://github.com/alex1989hu/kubelet-serving-cert-approver
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/kubelet-serving-cert-approver
+      icon: right-arrow
+---

src/content/docs/applications/kubernetes-cloudflare-ddns.mdx

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+---
+title: Kubelet Serving Certificate Approver
+description: This is a simple Kubernetes cronjob which can be used for updating a DNS record on Cloudflare.
+hero:
+  tagline: This is a simple Kubernetes cronjob which can be used for updating a DNS record on Cloudflare.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/cloudflare.webp
+  actions:
+    - text: Source
+      link: https://github.com/kubitodev/kubernetes-cloudflare-ddns
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/kubernetes-cloudflare-ddns
+      icon: right-arrow
+---

src/content/docs/applications/languagetool.mdx

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+---
+title: LanguageTool
+description: LanguageTool is open-source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.
+hero:
+  tagline: LanguageTool is open-source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.
+  image:
+    file: https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/languagetool.webp
+  actions:
+    - text: Source
+      link: https://github.com/languagetool-org/languagetool
+      icon: right-arrow
+    - text: Deployment Chart
+      link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/languagetool
+      icon: right-arrow
+---