Copy rather than move

Author: thespad

root/etc/s6-overlay/s6-rc.d/init-piwigo-config/run

@@ -47,8 +47,8 @@ done
 
 # Update standard pages & default theme
 if [[ -d /config/www/themes ]]; then
-    mv -f /app/www/public/themes/standard_pages/ /config/www/themes/
-    mv -f /app/www/public/themes/default/ /config/www/themes/
+    cp -R /app/www/public/themes/standard_pages/ /config/www/themes/
+    cp -R /app/www/public/themes/default/ /config/www/themes/
 fi
 
 symlinks=(