Revise MVK documentation: replace mermaid diagrams with images, add new sections for single node and three node viability, and enhance the usage slide with additional context.

pages/infctl-summary-end.md

@@ -0,0 +1,31 @@
+# Pre release
+
+<div grid="~ cols-2 gap-4">
+<div>
+
+[MVK](https://mvk.headshed.dev) is new and evolving
+
+`infctl` is an early release.
+
+Its a snapshot of ideas I've been working on for over 10 years.
+
+I'd like to share it as I code it and use it.
+
+It is open to ideas, comments, contribution and collaboration.
+
+License: [GNU General Public License](https://www.gnu.org/licenses/gpl-3.0.en.html)
+
+
+# [https://headshed.dev/n25](https://headshed.dev/n25) 
+
+</div>
+<div>
+
+<img class="mx-auto" alt="qr code for https://headshed.dev/n25/" src="/n25-qr.png">
+
+</div>
+</div>
+
+<!--
+TBC
+-->