监控您的应用程序：工具和技术

# prometheus.ymlglobal:  scrape_interval: 15sscrape_configs:  - job_name: 'my-nodejs-app'    static_configs:      - targets: ['localhost:3000']

// middleware/logger.jsconst { createLogger, transports, format } = require('winston');const expressWinston = require('express-winston');const logger = createLogger({  level: 'info',  format: format.combine(    format.timestamp(),    format.json()  ),  transports: [    new transports.Console(),    new transports.File({ filename: 'combined.log' })  ],});const requestLogger = expressWinston.logger({  transports: [    new transports.Console(),    new transports.File({ filename: 'requests.log' })  ],  format: format.combine(    format.timestamp(),    format.json()  ),  meta: true,  msg: 'HTTP {{req.method}} {{req.url}}',  expressFormat: true,  colorize: false,});module.exports = {  logger,  requestLogger,};