Add Docker setup with nginx for serving the game

- Add Dockerfile using nginx:alpine base image
- Add docker-compose.yml for easy container management
- Add nginx.conf with minimal configuration and gzip compression
- Service renamed to 'ui' for better naming convention

nginx.conf

@@ -0,0 +1,17 @@
+server {
+    listen 80;
+    server_name localhost;
+    
+    root /usr/share/nginx/html;
+    index index.html;
+    
+    location / {
+        try_files $uri $uri/ =404;
+    }
+    
+    # Enable gzip compression
+    gzip on;
+    gzip_types text/html text/css application/javascript;
+    gzip_min_length 1000;
+}
+