chore(infra): update build config and deployment scripts

Update Docker configurations, nginx setup, and shared design tokens. Refresh lockfile.

nginx.conf

@@ -0,0 +1,27 @@
+server {
+    listen 4321;
+    server_name _;
+    root /usr/share/nginx/html;
+
+    # Gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_proxied any;
+    gzip_comp_level 6;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript application/rss+xml text/x-component text/x-cross-domain-policy;
+
+    # Cache static assets
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public";
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN";
+    add_header X-Content-Type-Options "nosniff";
+    add_header X-XSS-Protection "1; mode=block";
+}