Add initial baby-names service

views/baby-names/index.hbs

@@ -0,0 +1,13 @@
+<form action='/baby-names/form' method='get'>
+  <input type='text' name='key' placeholder='Enter your key' required />
+  <button type='submit'>Log In</button>
+</form>
+
+{{#if previousKey}}
+  <i>or</i>
+
+  <form action='/baby-names/form' method='get'>
+    <input type='hidden' name='key' value='{{previousKey}}' />
+    <button type='submit'>Continue as {{previousKey}}</button>
+  </form>
+{{/if}}