add css mime-type and add location for static files

rootfs/nginx.conf

@@ -10,6 +10,15 @@ server {
         try_files $uri $uri/ /index.php?$args;
     }
 
+    location ~ \.css {
+        add_header Content-Type text/css;
+    }
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|woff|woff2|ttf|svg|otf|eot)$ {
+        try_files $uri =404;
+        expires 30d;
+        add_header Cache-Control "public, no-transform";
+    }
+
     location ~ \.php$ {
         include fastcgi_params;
         fastcgi_pass unix:/var/run/php-fpm.sock;