LinkStack (#6137)

* 'Add new script'

* Update linkstack.sh

* Update linkstack.json

* Update linkstack.sh

---------

Co-authored-by: push-app-to-main[bot] <203845782+push-app-to-main[bot]@users.noreply.github.com>
Co-authored-by: CanbiZ <47820557+MickLesk@users.noreply.github.com>

frontend/public/json/linkstack.json

@@ -0,0 +1,44 @@
+{
+  "name": "LinkStack",
+  "slug": "linkstack",
+  "categories": [
+    9
+  ],
+  "date_created": "2025-07-22",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "config_path": "/var/www/html/linkstack/.env",
+  "interface_port": 80,
+  "documentation": "https://docs.linkstack.org/",
+  "website": "https://linkstack.org/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/linkstack.webp",
+  "description": "LinkStack is an open-source, self-hosted alternative to Linktree, allowing users to create a customizable profile page to share multiple links, hosted on their own server.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/linkstack.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 1024,
+        "hdd": 5,
+        "os": "Debian",
+        "version": "12"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "LinkStack can be updated via the user interface.",
+      "type": "info"
+    },
+    {
+      "text": "Complete setup via the web interface at http://<container-ip>/. Check installation logs: `cat ~/linkstack-install.log`",
+      "type": "info"
+    }
+  ]
+}