handle errors and fix join form

app/views/errors/internal_error.html.erb

@@ -0,0 +1,7 @@
+<div class="text-center center-page">
+  <h1 class="display-2 font-weight-400">Oh no!</h1>
+  <h3>Looks like something went wrong on our end.</h3>
+  <%= link_to root_url do %>
+    <h4>Return to home page.</h4>
+  <% end %>
+</div>

app/views/errors/not_found.html.erb

@@ -0,0 +1,8 @@
+<div class="text-center center-page">
+  <h1 class="display-2 font-weight-400">Whoops!</h1>
+  <h2>Looks like we can't find that resource.</h2>
+  <h3>Is it possible its been removed?</h3>
+  <%= link_to root_url do %>
+    <h4>Return to home page.</h4>
+  <% end %>
+</div>

app/views/errors/unprocessable.html.erb

@@ -0,0 +1,7 @@
+<div class="text-center center-page">
+  <h1 class="display-2 font-weight-400">Oops!</h1>
+  <h3>Request is unprocessable.</h3>
+  <%= link_to root_url do %>
+    <h4>Return to home page.</h4>
+  <% end %>
+</div>

app/views/rooms/join.html.erb

@@ -1,7 +1,12 @@
 <%= render 'shared/room_event' do %>
   <%= form_for room_path, method: :post do |f| %>
     <div class="input-group" style="height: 48px;">
-      <%= f.text_field :join_name, class: "form-control main-large", placeholder: "Enter your name!", value: "#{current_user ? current_user.name : ''}" %>
+      <%= f.text_field :join_name,
+          required: true,
+          class: "form-control main-large",
+          placeholder: "Enter your name!",
+          value: "#{current_user ? current_user.name : ''}",
+          readonly: !current_user.nil? %>
       <span class="input-group-append">
         <%= f.submit "Join", class: "btn btn-primary px-7 main-large" %>
       </span>

app/views/shared/components/_subtitle.html.erb

@@ -3,6 +3,7 @@
       <p class="subtitle"><%= subtitle %></p>
     </div>
     <% if search %>
+      <!--
       <div class="col-3">
         <div class="input-icon">
           <span class="input-icon-addon">
@@ -11,6 +12,7 @@
           <input type="text" class="form-control btn-pill" placeholder="Search...">
         </div>
       </div>
+      -->
     <% end %>
   </div>
   <hr class="mt-0">