add debug

src/reverseproxy.js

@@ -699,6 +699,8 @@ async function checkCerts(options, auditSource, progressCallback) {
 function removeAppConfigs() {
     const dashboardConfigFilename = `${settings.dashboardFqdn()}.conf`;
 
+    debug('removeAppConfigs: reomving nginx configs of apps');
+
     // remove all configs which are not the default or current dashboard
     for (let appConfigFile of fs.readdirSync(paths.NGINX_APPCONFIG_DIR)) {
         if (appConfigFile !== constants.NGINX_DEFAULT_CONFIG_FILE_NAME && appConfigFile !== dashboardConfigFilename) {