repair DefaultAppConfig

Author: samuelcambien

src/config/default-app-config.ts

@@ -19,6 +19,7 @@ import { ActuatorsConfig } from './actuators.config';
 import { InfoConfig } from './info-config.interface';
 import { CommunityListConfig } from './community-list-config.interface';
 import { HomeConfig } from './homepage-config.interface';
+import { MarkdownConfig } from './markdown-config.interface';
 
 export class DefaultAppConfig implements AppConfig {
   production = false;
@@ -365,7 +366,7 @@ export class DefaultAppConfig implements AppConfig {
     enablePrivacyStatement: true
   };
 
-  markdown: {
+  markdown: MarkdownConfig = {
     enabled: false,
     mathjax: false,
   };