node_app/pytesseractJsOCR.js

const Tesseract = require('tesseract.js');
const fs = require('fs');

const image = process.argv[2];
const lang = process.argv[3];
const saveFilePath = process.argv[4];

Tesseract.recognize(
  image,
  lang,
  {
    logger: m => console.log(m)
  }
).then(({ data: { text } }) => {
  console.log(text);
  fs.writeFileSync(saveFilePath, text);
}).catch(err => {
  console.error(err);
  fs.writeFileSync(saveFilePath, 'Error: ' + err.message);
});