Image upload on cloudinary not working in heroku - node.js

Question

I am using multer and cloudinary for image upload in node.js app. When I am in development mode, it works perfectly fine but after deploying to heroku, I am getting error in browser console as
the server responded with a status of 503 (Service Unavailable). When I check heroku logs it showed as
at=error code=H12 desc="Request timeout" method=POST path="/api/users/upload/avatar"
I have already added my environment variables in heroku. What could be a problem?
My config file
const {config,uploader } = require('cloudinary').v2
const cloudinaryConfig = (req,res,next) => {
config({
cloud_name: process.env.CLOUD_NAME,
api_key: process.env.API_KEY,
api_secret: process.env.API_SECRET,
});
next()
}
module.exports ={cloudinaryConfig,uploader}
Multer file
const DatauriParser = require('datauri/parser');
const parser = new DatauriParser();
const storage = multer.memoryStorage();
const multerUploads = multer({ storage,fileFilter:(req,file,cb)=>{
let ext = path.extname(file.originalname);
if (ext !== ".jpg" && ext !== ".jpeg" && ext !== ".png") {
cb(new Error("File type is not supported"), false);
return;
} cb(null,true)
} }).single('image');
const dataUri = req => parser.format(path.extname(req.file.originalname).toString(),req.file.buffer)
module.exports = {multerUploads,dataUri}
My upload controller
const uploadImage = async(req,res)=>{
const folder = req.path.split('/',3)[2]
if(!req.file){
throw new Error('Choose a picture to upload')
}
if(req.file){
const file = dataUri(req).content
const result = await uploader.upload(file,{
folder:`MobiHub/${folder}`,
width: 300,
height:300,
crop:'fill',
gravity: "faces"
})
const image = result.secure_url
res.json({image})
}
}

Answer 1

Setting the Cloudinary environment variables (e.g., process.env.CLOUD_NAME) on the Heroku config vars may help.
Or simply try to add the CLOUDINARY_URL environment variable (can be found on the Cloudinary dashboard), then you won't need to explicitly declare them on cloudinary.config().