text: import { createReadStream, createWriteStream } from 'fs'
  import { createHash } from 'crypto'
  
  const filename = process.argv[2]
  const sha1Stream = createHash('sha1').setEncoding('hex')
  const md5Stream = createHash('md5').setEncoding('hex')
  
  const inputStream = createReadStream(filename)
  
  inputStream
    .pipe(sha1Stream)
    .pipe(createWriteStream(`${filename}.sha1`))
  
  inputStream
    .pipe(md5Stream)
    .pipe(createWriteStream(`${filename}.md5`))
  