split login/welcome and added direct link welcome

app/views/candidate/login.html.erb

@@ -0,0 +1,20 @@
+<% content_for :title, "Skills Assessment" %>
+
+<main class="intro_tpl">
+  <h1 class="prft-heading">Let's Get Started</h1>
+  <p>
+    Hey there! Give us your test id, and we'll get you started.
+  </p>
+
+  <%= form_tag(validate_candidate_path) do %>
+    <div class="form-group">
+      <label for="userid">What's your Test ID?</label>
+      <input type="text" id="test_id" name="test_id" required/>
+
+      <% if flash[:error].present? %>
+          <div class="error"><%= flash[:error] %></div>
+      <% end %>
+    </div>
+    <button type="submit">Login</button>
+  <% end %>
+</main>