prometheus/web/ui/templates/config.html

{{define "head"}}
    <link type="text/css" rel="stylesheet" href="{{ pathPrefix }}/classic/static/css/config.css?v={{ buildVersion }}">
    <script src="{{ pathPrefix }}/classic/static/js/config.js?v={{ buildVersion }}"></script>
{{end}}

{{define "content"}}
  <div class="container-fluid">
    <h2 id="configuration">Configuration <button type="button" class="btn btn-primary" id="copyToClipboard">Copy to clipboard</button></h2>

    <pre id="config_yaml">{{.}}</pre>
  </div>
{{end}}