Enable pretty URLs (https://docs.nextcloud.com/server/latest/admin_manual/installation/source_installation.html\#pretty-urls)

templates/application/config.php.erb

@@ -64,7 +64,6 @@ $CONFIG = array (
   'gss.mode' => '<%= @gss_mode %>',
   'gss.user.discovery.module' => '\\OCA\\GlobalSiteSelector\\UserDiscoveryModules\\ManualUserMapping',
   'gss.username_format' => 'sanitize',
-  'htaccess.RewriteBase' => '/',
   'installed' => true,
   'instanceid' => '<%= @instanceid %>',
   'integrity.check.disabled' => true,
@@ -107,6 +106,7 @@ $CONFIG = array (
     ),
   ),
   'overwrite.cli.url' => 'https://<%= @site_name %>/',
+  'htaccess.RewriteBase' => '/',
   'overwritehost' => '<%= @site_name %>',
   'overwriteprotocol' => 'https',
   'passwordsalt' => '<%= @passwordsalt %>',