Nhipster blob entity generator issue front angular

##### **Overview of the issue**
How to fix Blob front Angular view issue ?

##### **Motivation for or Use Case**
When you use nhipster entity generator with an angular front. Angular can't render the image of the blob after beeing storage in database.

##### **Reproduce the error**
use nhipster entity generator and you will have issue to view blob from backend.

##### **Suggest a Fix**
when the service nest get the blob image from the server, the image is convert in an buffer of hexadecimal. So I had to fix the service to add a converter hexaToString like the following function :
const blob = roadMap.image.toString('hex');
var result = '';
for (var i = 0; i < blob.length; i = i + 2) {
var decval = parseInt(blob.substr(i, 2), 16);
result = result + String.fromCharCode(decval);
}

##### **JHipster Version(s)**
last version

##### **JHipster configuration**
nhipster

Reproduce the issue with the entity generator using an Angular front end and a blob image stored in the database. Inspect the generated Angular view and Nest service response to trace the image data; done means the stored blob renders correctly in the generated front end. The issue's suggested hexadecimal conversion can help guide the investigation.

Written by the indexing model from the issue text.