@Test void replacesBaseTag() throws Exception {
    assertThat(get("/zipkin/index.html").body().string()).isEqualTo("""
      <!-- simplified version of /zipkin-lens/index.html -->
      <html>
        <head>
          <base href="/admin/zipkin/">
          <link rel="icon" href="./favicon.ico">
          <script type="module" crossorigin="" src="./static/js/index.js"></script>
          <link rel="stylesheet" href="./static/css/index.css">
        </head>
        <body>zipkin-lens</body>
      </html>
      """
    );
  }
The test sets the property {@code zipkin.ui.base-path=/foozipkin}, which should reflect in
index.html
zipkin-server/src/test/java/zipkin2/server/internal/ui/ITZipkinUiConfiguration.java