Ubuntu Node.js日志中如何监控外部依赖

<code>const axios = require('axios');

axios.get('https://api.example.com/data')
  .then(response => {
    console.log('Data fetched successfully:', response.data);
  })
  .catch(error => {
    console.error('Error fetching data:', error);
  });</code>

<code>const axios = require('axios');
const winston = require('winston');

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.json(),
  transports: [
    new winston.transports.Console(),
    new winston.transports.File({ filename: 'error.log', level: 'error' }),
    new winston.transports.File({ filename: 'combined.log' })
  ]
});

axios.get('https://api.example.com/data')
  .then(response => {
    logger.info('Data fetched successfully:', response.data);
  })
  .catch(error => {
    logger.error('Error fetching data:', error);
  });</code>

<code>npm install pm2 -g
pm2 start app.js --name my-app
pm2 logs my-app</code>