index.html.eex

<section class="phx-hero">
  <h1>Welcome to Awesome App!</h1>
  <p>To get started, login to your GitHub Account: <p>

  <div style="display:flex; flex-direction:column; width:357px; margin-left:110px">
    <link href="https://fonts.googleapis.com/css?family=Roboto&display=swap">
    <a href="<%= @oauth_github_url %>"
      style="display:inline-flex; align-items:center; min-height:60px;
        background-color:#24292e; font-family:'Roboto',sans-serif;
        font-size:28px; color:white; text-decoration:none;">
      <div style="margin-top: 6px; margin-left:7px; padding-top:5px; min-height:50px;">
      <svg height="35" viewBox="0 0 16 16" width="52px" style="fill:white;">
        <path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38
        0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01
        1.08.58 1.23.82.72 1.21 1.87.87
        2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12
        0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08
        2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0
        .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"/>
      </svg>
      </div>
      <div style="margin-left: 17px;">
        Sign in with GitHub
      </div>
    </a>
  <div>

</section>