Upload attachment in JIRA using MS bot Framework

Question

I'm trying to upload an attachment for Jira ticket using Microsoft Bot framework in Nodejs.

I'm calling the attachment Api in Jira using below code snippet:

const axios = require('axios');
const dotenv = require('dotenv');
const fs = require('fs');
const FormData = require('form-data')

dotenv.config();

class attachmentAPI {
    constructor() {
    }
    async uploadJIRAImage(key) {


        let urlString = `https://{jira-site-name}.atlassian.net/rest/api/2/issue/${key}/attachments`;
        console.log(urlString);

        const credentials = process.env.JiraUsername + ":" + process.env.JiraPassword;
        const hash = Buffer.from(credentials).toString('base64');
        const Basic = 'Basic ' + hash;


        let formData = new FormData();
        //Here I want to upload image url from emulator
        **let stream = fs.createReadStream("Image.png");**
        formData.append('file', stream);
        let formHeaders = formData.getHeaders();

        let res = await axios.post(urlString, formData, {
            headers: {
            'Accept': 'application/json',
            'Authorization': Basic,
            'X-Atlassian-Token': 'nocheck',
            ...formHeaders
            }
        });

        console.log("Api-Result: ",res)
    }
        

}
exports.attachmentAPI = attachmentAPI;

In this way I can now able to upload the image. As it is located in the same folder locally. But I want to upload an image url from emulator, that need to be attached to JIRA ticket.

emulator image uploaded content is in this format:

{
name: 'SAP-Logo.png',
contentType: 'image/png',
contentUrl: 'http://localhost:12345/v3/attachments/1b864600-fe77-11eb-bc85-b3c9f4256d99/views/original' 
}

How do I successfully send the image Url/path in the above code as formdata that attach the image to Jira ticket?

Thanks in advance.