Add trailing slash redirect rule in nginx.conf to standardize URLs

nginx.conf

@@ -13,6 +13,11 @@ http {
   server {
     listen 80;
 
+    # Automatically redirect URLs missing trailing slash (but not files like .js, .css, etc.)
+    if ($request_uri ~ ^([^.\?\#]*[^/])$) {
+      return 301 $request_uri/;
+    }
+
     location / {
       proxy_pass http://main-website:3000;
       proxy_set_header Host $host;