fix on nginx and astro

Signed-off-by: Omar Sánchez Pizarro <omar.sanchez@pistacero.net>

web/dashboard/nginx.conf

@@ -1,7 +1,7 @@
 server {
     listen 80;
     server_name localhost;
-    root /usr/share/nginx/html/dashboard;
+    root /usr/share/nginx/html;
     index index.html;
 
     # Gzip compression
@@ -17,9 +17,9 @@ server {
         try_files $uri =404;
     }
 
-    # SPA routing - todo desde la raíz del contenedor
-    location / {
-        try_files $uri $uri/ /index.html;
+    # SPA routing - todas las rutas con prefijo /dashboard/
+    location /dashboard/ {
+        try_files $uri $uri/ /dashboard/index.html;
     }
 }