reinstalled all contribs with composer

need to run :
drush ev 'drupal_flush_all_caches();'
drush cr
and restart nginx and php-fpm before loading the website

web/themes/custom/edlptheme/assets/dist/styles/app.css

@@ -0,0 +1,14 @@
+body {
+  background: white; }
+
+.btn--hollow {
+  background: red;
+  display: inline-block;
+  padding: 10px; }
+
+body, html {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  font-family: Georgia, serif;
+  font-style: normal; }