githubLogo.html

<a href="#" style="
  text-decoration: none;
  font-family: helvetica;
  font-weight: bold;
  color: #ddd;
  background-color: black;
  height: 30px;
  display: inline-block;
  padding: 1px 12px 0 0;
  border-radius: 5px;
">
<svg xmlns="http://www.w3.org/2000/svg"
aria-label="GitHub" role="img"
viewBox="0 0 512 512" style="
  width: 30px; vertical-align: middle; border-right:0.5px solid #aaa;"
><rect
width="512" height="512" rx="15%" fill="#1B1817"/>
<path fill="#fff" d="M335 499c14 0 12 17 12 17H165s-2-17 12-17c13 0 16-6 16-12l-1-50c-71 16-86-28-86-28-12-30-28-37-28-37-24-16 1-16 1-16 26 2 40 26 40 26 22 39 59 28 74 22 2-17 9-28 16-35-57-6-116-28-116-126 0-28 10-51 26-69-3-6-11-32 3-67 0 0 21-7 70 26 42-12 86-12 128 0 49-33 70-26 70-26 14 35 6 61 3 67 16 18 26 41 26 69 0 98-60 120-117 126 10 8 18 24 18 48l-1 70c0 6 3 12 16 12z"/>
</svg>
<span style="padding-left: 5px;">Log in with GitHub</span>
</a>