fix(nginx): replace 301 redirects with rewrite rules for /flintstones and /orcid2words to prevent internal port exposure and improve URL handling

frontend/nginx.conf

@@ -17,7 +17,8 @@ server {
     }
 
     location = /flintstones {
-        return 301 /flintstones/;
+        # Sin 301: Apache puede reescribir `Location` y exponer puerto interno (p. ej. :5173) y bucles.
+        rewrite ^ /flintstones/ last;
     }
 
     location ^~ /orcid2words/ {
@@ -26,7 +27,7 @@ server {
     }
 
     location = /orcid2words {
-        return 301 /orcid2words/;
+        rewrite ^ /orcid2words/ last;
     }
 
     location / {