Add qrcodes as images

slides.md

@@ -41,6 +41,9 @@ layout: full
   <li><mdi-mastodon /> @jake@theorangeone.net</li>
 </ul>
 
+<div class="absolute right-3 top-3">
+  <img src="/wsnl24-qrcode.png" width="190px" />
+</div>
 
 <style>
   .slidev-layout {
@@ -149,6 +152,10 @@ layout: section
 ## 1:
 # Template Fragment Caching
 
+<div class="absolute right-1/2 translate-x-1/2 top-3">
+  <img src="/template-fragment-caching-qrcode.png" width="150px" />
+</div>
+
 <!--
 - Template fragment caching
   - New ish in 5.2
@@ -789,6 +796,10 @@ layout: section
 # Frontend Cache Invalidation
 ### Wagtail secret sauce <logos-wagtail class="fill-white"/>
 
+<div class="absolute right-1/2 translate-x-1/2 top-3">
+  <img src="/frontend-caching-qrcode.png" width="150px" />
+</div>
+
 <!--
 - Frontend cache invalidation!
 - Wagtail to the rescue