Add Dokploy install and container scripts

Introduces Dokploy support with installation and container setup scripts, and adds metadata for frontend integration. These changes enable automated deployment and management of Dokploy as a container, including resource configuration and update handling.

frontend/public/json/dokploy.json

@@ -0,0 +1,48 @@
+{
+    "name": "Dokploy",
+    "slug": "dokploy",
+    "categories": [
+        6
+    ],
+    "date_created": "2025-12-09",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 3000,
+    "documentation": "https://docs.dokploy.com/",
+    "config_path": "/etc/dokploy",
+    "website": "https://dokploy.com/",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/png/dokploy.png",
+    "description": "Dokploy is a free, self-hostable Platform as a Service (PaaS) that simplifies the deployment and management of applications and databases. Built with Docker and Traefik, it offers features like automatic SSL, Docker Compose support, database backups, and a real-time monitoring dashboard.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/dokploy.sh",
+            "resources": {
+                "cpu": 2,
+                "ram": 2048,
+                "hdd": 10,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "Initial setup will be done via the web interface on first access.",
+            "type": "info"
+        },
+        {
+            "text": "Dokploy has built-in auto-updates via the web interface.",
+            "type": "info"
+        },
+        {
+            "text": "This container uses Docker-in-Docker (nesting) for application deployments.",
+            "type": "warning"
+        }
+    ]
+}