Add container templates and installers for apps

Add new ProxmoxVED container templates (ct/*.sh), install scripts (install/*.sh) and metadata (json/*.json) for multiple applications: Akaunting, Blinko, Certimate, Dagu, Gogs, InvoiceShelf, Matomo, Papermark, RSS-Bridge, SolidTime and WhoDB. Each ct script includes update logic and deployment helpers; install scripts handle dependency installation, service creation (systemd), DB setup, and Caddy/PHP/Node/Postgres configuration where applicable. JSON entries provide UI metadata, resource defaults and access ports for each app.

json/certimate.json

@@ -0,0 +1,40 @@
+{
+    "name": "Certimate",
+    "slug": "certimate",
+    "categories": [
+        6
+    ],
+    "date_created": "2026-07-13",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 8090,
+    "documentation": "https://docs.certimate.me/",
+    "website": "https://certimate.me/",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/certimate.webp",
+    "config_path": "",
+    "description": "Certimate is an open-source SSL certificate management tool that automates the application, deployment, and renewal of SSL certificates, supporting integration with various cloud providers and deployment targets.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/certimate.sh",
+            "resources": {
+                "cpu": 1,
+                "ram": 256,
+                "hdd": 2,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": "admin@certimate.fun",
+        "password": "1234567890"
+    },
+    "notes": [
+        {
+            "text": "Change the default password after first login!",
+            "type": "warning"
+        }
+    ]
+}