Merge branch '190-donnees-manquantes-fiche-structure' into 'dev'

fix: missing data in structure admin (optional email)

See merge request !251

src/structures/schemas/structure.schema.ts

@@ -70,8 +70,7 @@ export class Structure {
   contactPhone?: string;
 
   @Prop()
-  @IsNotEmpty()
-  contactMail: string;
+  contactMail?: string;
 
   @Prop()
   website: string;