Clean up html on the website.

- Fixes some html validation issues.
- Fixes links on security basics blog post.
- Adds rel=noopener to links with target=_blank and adds a check to
  htmlproofer.
- Add favicon check to htmlproofer.

Fixes #3286
Fixes #3284

PiperOrigin-RevId: 321892602

3 files changed, 3 insertions, 3 deletions

diff --git a/website/_includes/footer.html b/website/_includes/footer.html
index 9cc8176f7..c1a373329 100644
--- a/website/_includes/footer.html
+++ b/website/_includes/footer.html
@@ -8,7 +8,7 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.min.js" integrity="sha256-hYXbQJK4qdJiAeDVjjQ9G0D6A0xLnDQ4eJI9dkm7Fpk=" crossorigin="anonymous"></script>
 
 {% if site.analytics %}
-<script type="application/javascript">
+<script>
 var doNotTrack = false;
 if (!doNotTrack) {
   window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
diff --git a/website/_includes/graph.html b/website/_includes/graph.html
index f3a999341..ba4cf9840 100644
--- a/website/_includes/graph.html
+++ b/website/_includes/graph.html
@@ -1,7 +1,7 @@
 {::nomarkdown}
 {% assign fn = include.id | remove: " " | remove: "-" | downcase %}
 <figure><a href="{{ include.url }}"><svg id="{{ include.id }}" width=500 height=200 onload="render_{{ fn }}()"><title>{{ include.title }}</title></svg></a></figure>
-<script type="text/javascript">
+<script>
 function render_{{ fn }}() {
 d3.csv("{{ include.url }}", function(d, i, columns) {
     return d; // Transformed below.
diff --git a/website/_includes/header-links.html b/website/_includes/header-links.html
index 467bb1e72..4232fdaa5 100644
--- a/website/_includes/header-links.html
+++ b/website/_includes/header-links.html
@@ -2,7 +2,7 @@
   <div class="container">
     <div class="navbar-brand">
       <a href="/">
-        <img src="/assets/logos/logo_solo_on_dark.svg" height="25px" class="d-inline-block align-top" style="margin-right: 10px;" alt="logo"/>
+        <img src="/assets/logos/logo_solo_on_dark.svg" height="25" class="d-inline-block align-top" style="margin-right: 10px;" alt="logo" />
         gVisor
       </a>
     </div>