1405/7/18-fix bug in daily question

nginx.conf

@@ -5,7 +5,23 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
-    location / {
-        try_files $uri /index.html;
+    # Hashed build assets must never fall back to index.html.
+    # Otherwise missing JS/CSS returns text/html and browsers throw MIME errors.
+    location /assets/ {
+        try_files $uri =404;
+        access_log off;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
     }
-}
+
+    location ~* \.(?:js|css|png|jpg|jpeg|gif|ico|svg|webp|woff2?|ttf|eot|webmanifest|map)$ {
+        try_files $uri =404;
+        access_log off;
+        expires 7d;
+        add_header Cache-Control "public";
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}