Update README.md (#62)

README.md

@@ -1,5 +1,7 @@
 # README.md
 
+[![Run WebsiteArchiver](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/archival.yml/badge.svg)](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/archival.yml) [![Validate Bicep files](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/bicep.yml/badge.svg)](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/bicep.yml) [![Deploy to GitHub Pages](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/gh-pages.yml/badge.svg)](https://github.com/stuartmccoll/stuartmccoll.github.io/actions/workflows/gh-pages.yml)
+
 This repository contains both the source and build files for my personal
 website, which is hosted via GitHub Pages and accessible at
 [https://stuartmccoll.github.io/](https://stuartmccoll.github.io/).
@@ -50,6 +52,34 @@ Upon merge of a pull request into the `main` branch, the GitHub Action
 will update the `gh-pages` branch with the latest build of the static files.
 This branch is then served via GitHub Pages.
 
+## GitHub Actions
+
+### Website Archiver
+
+Previous versions of the website are archived by triggering an instance of
+the [website-archiver](https://github.com/stuartmccoll/website-archiver)
+running in Azure.
+
+For this workflow to run successfully, the following repository secrets
+must be configured:
+
+* `AZURE_BLOB_STORAGE_CONNECTION_STRING`
+* `AZURE_CONTAINER_REGISTRY_LOGIN_SERVER`
+* `AZURE_CONTAINER_REGISTRY_PASSWORD`
+* `AZURE_CONTAINER_REGISTRY_USERNAME`
+* `AZURE_CREDENTIALS`
+
+The `AZURE_CREDENTIALS` value should be in the following format:
+
+```json
+{
+    "clientId":"${{ Azure App Registration Client ID }}",
+    "clientSecret":"${{ Azure App Registration Client Secret }}",
+    "subscriptionId":"${{ Azure Subscription ID }}",
+    "tenantId":"${{ Azure Tenant ID }}"
+}
+```
+
 ## GitHub Codespaces
 
 This repository contains all of the necessary configuration to run in a GitHub