planka (#5277)

* 'Add new script'

* Update planka.sh

* Update planka.sh

* Update planka.json

---------

Co-authored-by: push-app-to-main[bot] <203845782+push-app-to-main[bot]@users.noreply.github.com>
Co-authored-by: Slaviša Arežina <58952836+tremor021@users.noreply.github.com>

frontend/public/json/planka.json

@@ -0,0 +1,40 @@
+{
+  "name": "PLANKA",
+  "slug": "planka",
+  "categories": [
+    12
+  ],
+  "date_created": "2025-06-09",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 1337,
+  "documentation": "https://docs.planka.cloud/",
+  "website": "https://planka.app/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/planka.webp",
+  "config_path": "/opt/planka/planka/.env",
+  "description": "Planka is a powerful, project management platform that transforms how teams collaborate. Create projects with multiple boards, organize tasks with intuitive drag-and-drop cards, attach files, write rich markdown descriptions, set due dates, assign team members, and keep conversations flowing with comments and labels—all with seamless real-time updates and smart notifications.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/planka.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 1024,
+        "hdd": 4,
+        "os": "debian",
+        "version": "12"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Type `cat ~/planka.creds` inside LXC to see admin user and database credentials.",
+      "type": "info"
+    }
+  ]
+}