fix for docker templates

src/app/components/preferences/docker/add-docker-template/add-docker-template.component.html

@@ -26,7 +26,7 @@
                             [ngModelOptions]="{standalone: true}" 
                             [(ngModel)]="selectedImage">
                             <mat-option *ngFor="let image of dockerImages" [value]="image">
-                                {{image.filename}}
+                                {{image.image}}
                             </mat-option>
                         </mat-select>
                         <div *ngIf="newImageSelected">

src/app/models/docker/docker-image.ts

@@ -1,3 +1,3 @@
 export class DockerImage {
-    filename: string;
+    image: string;
 }