Add some very basic styling

app/javascript/packs/frontend/assets/stylesheets/app.scss

@@ -1,3 +1,11 @@
-$primary: red;
+$primary: #E3350D;
+
+$border-radius: 0 !default;
+$border-radius-lg: 0 !default;
+$border-radius-sm: 0 !default;
+
+main#app {
+  //background-color: #dfdfdf;
+}
 
 @import '~bootstrap/scss/bootstrap.scss';

app/javascript/packs/frontend/components/layout/style.scss

@@ -0,0 +1,3 @@
+.navbar {
+  background-color: #E3350D;
+}