meteor__microscope/client/templates/application/layout.html

<template name="layout">
  <div class="container">
    <header class="navbar navbar-default" role="navigation">
      <div class="navbar-header">
        <a class="navbar-brand" href="{{pathFor 'postsList'}}">{{pageTitle}}</a>
      </div>
    </header>

    <div id="main">
      {{! IronRouter magic }}
      {{> yield}}
    </div>
  </div>
</template>