[Website] Remove trailing slashes (#9863)

Author: tobias-tengler

website-next/nginx/conf.d/redirects.conf

@@ -8,6 +8,12 @@
 #   * use `rewrite ... redirect`  for 302 redirects
 #   * group related rules with a short comment
 
+# Always strip trailing slashes. The static export uses non-slash URLs
+# (`trailingSlash: false`), so any path with a trailing slash 404s. Running
+# this first canonicalizes the path so every later rule and the file lookup
+# operate on the slash-free form (the root `/` is left untouched).
+rewrite ^/(.+)/$ /$1 permanent;
+
 # temporary redirects
 rewrite ^/platform/bananacakepop/?$ /products/nitro redirect;
 rewrite ^/products/hotchocolate/?$ /docs/hotchocolate redirect;