Wallabag (#9904)

* Add wallabag (ct)

* Apply suggestion from @tremor021

* Apply suggestion from @tremor021

* Apply suggestion from @tremor021

---------

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/wallabag.json

@@ -0,0 +1,40 @@
+{
+    "name": "Wallabag",
+    "slug": "wallabag",
+    "categories": [
+        12
+    ],
+    "date_created": "2025-12-09",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "config_path": "/opt/wallabag/app/config/parameters.yml",
+    "interface_port": 8000,
+    "documentation": "https://doc.wallabag.org/",
+    "website": "https://wallabag.org/",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/wallabag.webp",
+    "description": "Wallabag is a self-hosted read-it-later application. Save web articles to read them later, offline, in a clean and distraction-free interface. Features tagging, full-text search, and browser/mobile app integrations.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/wallabag.sh",
+            "resources": {
+                "cpu": 2,
+                "ram": 2048,
+                "hdd": 6,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "Database credentials are stored in ~/wallabag.creds",
+            "type": "info"
+        }
+    ]
+}