fix: update nginx configuration for caching, gzip compression, security headers, and error handling

frontend/nginx.conf

@@ -22,6 +22,8 @@ server {
     }
     location ~* \.(?:css|js)$ {
         add_header Cache-Control "no-cache";
+        try_files $uri =404;
+    }
 
     # SEO files - cache for 1 week
     location = /robots.txt {
@@ -61,6 +63,4 @@ server {
     # Error pages
     error_page 404 /index.html;
     error_page 500 502 503 504 /index.html;
-        try_files $uri =404;
-    }
 }