Add boilerplate for theming scss depending of environment conf

src/app/components/main-toolbar/main-toolbar-desktop/main-toolbar-desktop.component.scss

 @import "../../../../sass/abstracts/variables";
 @import "../../../../sass/abstracts/mixins";
 
+:host-context(body[theme='dlcm-theme']) {
+  .toolbar {
+    // Boilerplate for theming scss depending of environment conf
+  }
+}
+
 .toolbar {
   padding: 0 20px;
   display: flex;