Update to latest example-appstore structure with custom apps

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/nginx-proxy-manager/config.json

@@ -0,0 +1,44 @@
+{
+  "name": "Nginx Proxy Manager",
+  "id": "nginx-proxy-manager",
+  "available": true,
+  "short_desc": "Docker container for managing Nginx proxy hosts with a simple, powerful web interface",
+  "author": "jc21",
+  "port": 81,
+  "categories": [
+    "utilities",
+    "network"
+  ],
+  "description": "Nginx Proxy Manager enables you to easily forward to your websites running at home or otherwise, including free SSL, without having to know too much about Nginx or Letsencrypt.",
+  "tipi_version": 2,
+  "version": "2.13.5",
+  "source": "https://github.com/NginxProxyManager/nginx-proxy-manager",
+  "website": "https://nginxproxymanager.com",
+  "exposable": true,
+  "dynamic_config": true,
+  "no_gui": false,
+  "form_fields": [
+    {
+      "type": "number",
+      "label": "HTTP Port",
+      "env_variable": "NPM_HTTP_PORT",
+      "default": "1080",
+      "required": true,
+      "hint": "Port for HTTP traffic (mapped to container port 80)"
+    },
+    {
+      "type": "number",
+      "label": "HTTPS Port",
+      "env_variable": "NPM_HTTPS_PORT",
+      "default": "10443",
+      "required": true,
+      "hint": "Port for HTTPS traffic (mapped to container port 443)"
+    }
+  ],
+  "supported_architectures": [
+    "arm64",
+    "amd64"
+  ],
+  "created_at": 1731607800000,
+  "updated_at": 1731607800000
+}