how can i upload an image on express server code example

Example: how we can upload all other type of image through express-file uploader

app.post('/upload-profile-pic', (req, res) => {
    // 'profile_pic' is the name of our file input field in the HTML form
    let upload = multer({ storage: storage, fileFilter: helpers.imageFilter }).single('profile_pic');

    upload(req, res, function(err) {
        // req.file contains information of uploaded file
        // req.body contains information of text fields, if there were any

        if (req.fileValidationError) {
            return res.send(req.fileValidationError);
        }
        else if (!req.file) {
            return res.send('Please select an image to upload');
        }
        else if (err instanceof multer.MulterError) {
            return res.send(err);
        }
        else if (err) {
            return res.send(err);
        }

        // Display uploaded image for user validation
        res.send(`You have uploaded this image: <hr/><img src="${req.file.path}" width="500"><hr /><a href="./">Upload another image</a>`);
    });
});