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

Dockerfile

@@ -0,0 +1,11 @@
+FROM nginx:alpine
+
+# Copy the HTML file
+COPY index.html /usr/share/nginx/html/index.html
+
+# Copy nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Expose port 80
+EXPOSE 80
+