BAEL-797 Adding basic HTML landing page

spring-cloud/spring-cloud-bootstrap/gateway/src/main/angular/ui/src/app/app.component.html

@@ -1,6 +1,23 @@
-<h1>
-  {{title}}
-</h1>
-<ngb-alert [dismissible]="false">
-  <strong>Warning!</strong> Better check yourself, you're not looking too good.
-</ngb-alert>
+<nav class="navbar navbar-toggleable-md navbar-inverse fixed-top bg-inverse">
+  <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
+    <span class="navbar-toggler-icon"></span>
+  </button>
+  <a class="navbar-brand" href="#">Book Rater</a>
+  <div class="collapse navbar-collapse" id="navbarCollapse">
+    <ul class="navbar-nav mr-auto">
+    </ul>
+    <form class="form-inline mt-2 mt-md-0">
+      <input class="form-control mr-sm-2" type="text" placeholder="Username">
+      <input class="form-control mr-sm-2" type="password" placeholder="Password">
+      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Login</button>
+    </form>
+  </div>
+</nav>
+
+<div class="container">
+  <div class="jumbotron">
+    <h1>Book Rater App</h1>
+    <p class="lead">Keep track of all the latest books and their ratings.</p>
+  </div>
+
+</div>