Angular 2 - How to upload file and store in local folder

For example, I created a folder called 'upload' under src folder.

html file:

<div>
<input type="file" id="photo" (change)="onChange($event)" />
</div>
<div class="col-md-6 mb-4 mt-3">
<button (click)="upload()" class="btn btn-primary w-100">Upload Picture</button>
</div>


upload-modal.component.ts file

import { Http, Response } from '@angular/http';
import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
import "rxjs/add/operator/do";
import "rxjs/add/operator/map";
const uploadURL = '/upload';

@Component({

selector: 'upload-modal',
templateUrl: './upload-modal.component.html',
styleUrls: ['./upload-modal.component.css']
})
export class UploadModalComponent {
displayMessage: string = '';
constructor(public activeModal: NgbActiveModal, private http: Http, private el: ElementRef) { }
setDisplayMessage(msg: string) {
this.displayMessage = msg;
}

upload() {
this.activeModal.dismiss('Cross click');
}

onChange(event) {
let inputEl: HTMLInputElement = this.el.nativeElement.querySelector('#photo');

let fileCount: number = inputEl.files.length;

let formData = new FormData();

if (fileCount > 0) { // a file was selected

formData.append('photo', inputEl.files.item(0));

this.http
.post(uploadURL, formData).map((res: Response) => res.json()).subscribe(
// map the success function and alert the response
(success) => {
alert("success");
},
(error) => alert("error"));
}

}
}


when I click upload button, and I found this error in console log= http://localhost:3000/upload 404 (Not Found)
I guess this must to do with routing. Anyone has experience before?

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