Removed nodemon

Fixed several dependency vulnerabilities

backend/utils.js

@@ -443,7 +443,7 @@ async function fetchFile(url, path, file_label) {
 async function restartServer(is_update = false) {
     logger.info(`${is_update ? 'Update complete! ' : ''}Restarting server...`);
 
-    // the following line restarts the server through nodemon
+    // the following line restarts the server through pm2
     fs.writeFileSync(`restart${is_update ? '_update' : '_general'}.json`, 'internal use only');
     process.exit(1);
 }