Add webtools static frontend and serve it via docker-compose

Adds an nginx:alpine service serving webtools/ (item/map lookup
frontend) on port 80 alongside the existing login/char/world stack.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docker-compose.yml

@@ -81,6 +81,14 @@ services:
       charserver:
         condition: service_started
 
+  webtools:
+    image: nginx:alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+    volumes:
+      - "./webtools:/usr/share/nginx/html:ro"
+
 volumes:
   db-data:
   logs: