Add proper content type handling for Markdown files in Nginx configuration

nginx.conf

@@ -59,6 +59,13 @@ http {
             add_header Service-Worker-Allowed "/";
         }
 
+        # Markdown files with proper content type
+        location ~ \.md$ {
+            root   /usr/share/nginx/html;
+            add_header Content-Type text/markdown;
+            add_header Cache-Control "no-cache";
+        }
+
         # Serve static files
         location / {
             root   /usr/share/nginx/html;