How can I open an Image file using fs in NodeJS?

In my current codes, it does only can read a text file, How can I make an Image (base64) file opened with Photos Application (Windows)? Is there any chance to do that? If it’s impossible, please let me know!

const fs = require('fs')

fs.readFile('./Test/a.txt', 'utf8' , (err, data) => {
    if (err) {
      console.error(err)
      return
    }
    console.log(data)
    return
})