async function picToText(inputFile) {
    // Creates a client
    const client = new vision.ImageAnnotatorClient();

    // Performs text detection on the local file
    const [result] = await client.textDetection(inputFile);
    return result.fullTextAnnotation.text;
  }
Detects text in an image file

ARGS
inputFile: path to image file
RETURNS
string of text detected in the input image