add notes for publishing GH pages using a GH Action

Author: Andy Barrett

how-to-publish.md

@@ -0,0 +1,13 @@
+# How to Publish Cookbook on GH Pages
+
+I am following these [instructions](https://quarto.org/docs/publishing/github-pages.html#github-action) provided by Quarto.
+
+## 1. Freeze Computations
+
+I am only allowing code to be executed locally.
+
+In `_quarto.yml`, I have added the following
+```
+execute:
+  freeze: auto
+```