fix: dependencies

client/src/app/app.html

@@ -1,5 +1,10 @@
 <main class="main">
   <router-outlet></router-outlet>
+  
+
+<button type="button" class="btn">Base class</button>
+
+
 </main>
 <nav>
   <ul ngbNav class="nav-tabs custom-navbar bg-body-secondary">