diff --git a/conf.d/default.conf b/conf.d/default.conf
new file mode 100644
index 0000000..af6f8b0
--- /dev/null
+++ b/conf.d/default.conf
@@ -0,0 +1,40 @@
+server {
+    listen 80;
+    listen [::]:80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # HTML: revalidate so content updates are seen quickly
+    location ~* \.html?$ {
+        add_header Cache-Control "public, no-cache";
+        try_files $uri $uri/ =404;
+    }
+
+    # Versioned/hashed assets: long cache, immutable
+    location ~* \.(js|css)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+
+    # Images and media
+    location ~* \.(ico|png|jpg|jpeg|gif|webp|svg|avif)$ {
+        expires 30d;
+        add_header Cache-Control "public";
+        try_files $uri =404;
+    }
+
+    # Fonts
+    location ~* \.(woff2?|ttf|otf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+
+    # Default: serve static files, then try directory/index, then 404
+    location / {
+        add_header Cache-Control "public, no-cache";
+        try_files $uri $uri/ /index.html =404;
+    }
+}