Add Quartz service for serving Obsidian notes at /notes/

Replaces the custom Go/Vue notes system with Quartz v4, a polished
static site generator for Obsidian vaults. Mounts OBSIDIAN_DIR as the
Quartz content directory and serves it at /notes/ with hot-reload via
`npx quartz build --serve`.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nginx/nginx.conf.template

@@ -217,6 +217,21 @@ http {
             proxy_set_header Connection "upgrade";
         }
 
+        location /notes {
+            return 301 /notes/;
+        }
+
+        location /notes/ {
+            proxy_pass http://$QUARTZ_HOST:$QUARTZ_PORT/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
     }
 
 }