fixed asset paths

README.md

@@ -7,3 +7,29 @@ Builds html & css that can be used as custom error pages with, e.g., nginx.
 ## NOTE
 
 After production build, optionally remove the app.js script tags from the built files, just to optimize things further.
+
+### nginx example
+
+This could probably be optimized but it's working:
+
+```
+# Custom Unicorn Rainbow error pages
+location /err_css {
+  root /var/www/err;
+  autoindex off;
+  expires max;
+}
+location /err_images {
+  root /var/www/err;
+  autoindex off;
+  expires max;
+}
+error_page 403 404 /40x.html;
+location = /40x.html {
+  root /var/www/err;
+}
+error_page 500 502 503 504 /50x.html;
+location = /50x.html {
+  root /var/www/err;
+}
+```