Add joplin web article (#9)

services/www/content/registry.ts

@@ -2,6 +2,7 @@ import React from 'react';
 import * as TestArticle from './articles/2026/test-article.en.mdx';
 import * as MatrixServerDeploymentGuide from './articles/2026/matrix-server-deployment-guide.en.mdx';
 import * as XrayCoreSubnetMimicry from './articles/2026/xray-core-subnet-mimicry.en.mdx';
+import * as JoplinWebDeploymentGuide from './articles/2026/joplin-web-deployment-guide.en.mdx';
 
 export interface Article {
   slug: string;
@@ -47,6 +48,10 @@ export const articles: Record<string, Article> = {
     '2026/matrix-server-deployment-guide'
   ),
   'xray-core-subnet-mimicry': register(XrayCoreSubnetMimicry, '2026/xray-core-subnet-mimicry'),
+  'joplin-web-deployment-guide': register(
+    JoplinWebDeploymentGuide,
+    '2026/joplin-web-deployment-guide'
+  ),
 };
 
 export const sortedArticles = Object.values(articles).sort(