angualar image upload service

1<label class="image-upload-container btn btn-bwm">
2  <span>Select Image</span>
3  <input #imageInput
4         type="file"
5         accept="image/*"
6         (change)="processFile(imageInput)">
7</label>

1postFile(fileToUpload: File): Observable<boolean> {
2    const endpoint = 'your-destination-url';
3    const formData: FormData = new FormData();
4    formData.append('fileKey', fileToUpload, fileToUpload.name);
5    return this.httpClient
6      .post(endpoint, formData, { headers: yourHeadersConfig })
7      .map(() => { return true; })
8      .catch((e) => this.handleError(e));
9}