Fix pictures paths.

frontend/src/app/components/publication-list/publication-list.component.html

@@ -1,12 +1,12 @@
 @for(publication of publications$ | async; track publication) {
     <a [routerLink]="['/publications/' + publication.id]" class="publication">
-        <img src="/pictures/{{ publication.illustrationId }}"/>
+        <img src="/api/pictures/{{ publication.illustrationId }}"/>
         <div class="body">
             <h1>{{publication.title}}</h1>
             <h2>{{publication.description}}</h2>
         </div>
         <div class="footer">
-            <img src="/pictures/{{ publication.author.image }}" [matTooltip]="publication.author.name"/>
+            <img src="/api/pictures/{{ publication.author.image }}" [matTooltip]="publication.author.name"/>
             Publication posted by {{publication.author.name}}
             <span class="publication-date">
                 ({{ publication.creationDate | date: 'short' : 'fr-Fr' }})