relax language folder check and simplify rebuild tip

Author: lacatoire

.docker/entrypoint.sh

@@ -22,16 +22,16 @@ if [ ! -f /var/www/doc-base/configure.php ]; then
   exit 1
 fi
 
-# Check language documentation presence (must contain entities/)
-if [ ! -d /var/www/$LANGUAGE/entities ]; then
+# Check language documentation presence
+if [ ! -d "/var/www/$LANGUAGE" ] || [ ! -f "/var/www/$LANGUAGE/sources.xml" ]; then
   echo "❌ doc-${LANGUAGE} is missing or incomplete!"
   echo "👉 Please clone it before running Docker:"
   echo "   git clone https://github.com/php/doc-${LANGUAGE} ../doc-${LANGUAGE}"
   echo ""
-  echo "💡 Tip: remove any empty folders and recreate containers with:"
-  echo "   docker compose down --volumes && docker compose up --force-recreate"
+  echo "💡 Tip: remove any empty folders and rebuild containers with '--force-recreate'."
   exit 1
 fi
+
 done
 echo "✅ All prerequisites found."
 echo ""