⚡️(frontend) add caching headers for static assets in Nginx config

Configured Nginx to set caching headers for static assets by adding
a location block to match common static file extensions and set
an expiration time of 30 days.

It should result in faster loading times, reduced bandwidth usage,
and a more efficient and responsive user experience.

Wdyt @manuhabitela?

src/frontend/default.conf

@@ -4,6 +4,12 @@ server {
 
   root /usr/share/nginx/html;
 
+  # Serve static files with caching
+  location ~* ^/assets/.*\.(css|js|json|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+      expires 30d;
+      add_header Cache-Control "public, max-age=2592000";
+  }
+
   # Serve static files
   location / {
       try_files $uri $uri/ /index.html;
@@ -15,5 +21,4 @@ server {
 
   # Optionally, handle 404 errors by redirecting to index.html
   error_page 404 =200 /index.html;
-  
 }