Add AWS tagging how to guide

Author: spikeheap

docs/technical-standards/How-to guides/_category_.json

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+{
+  "collapsible": false,
+  "collapsed": false,
+}

docs/technical-standards/How-to guides/tagging.md

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+# How to tag your infrastructure
+
+This guide shows you how to configure tagging to meet the  [tagging standard](../Reference/hosting-standards/tagging.md) using infrastructure as code.
+
+## Terraform
+
+TODO
+
+## Serverless Framework
+
+In order to add tagging to AWS resources managed by Serverless Framework:
+
+1. Install the `serverless-plugin-resource-tagging` Node module, e.g. `npm install serverless-plugin-resource-tagging` or `yarn add serverless-plugin-resource-tagging`.
+2. Add the plugin to the `plugins` list in `serverless.yml` in your project and add the tags under `stackTags`, e.g.:
+    ```yaml
+    provider:
+      # ...
+      stackTags:
+          Application: "Developer Playbook"
+          TeamEmail: "[email protected]"
+          Environment: "production"
+
+          # For CircleCI
+          AutomationBuildUrl: ${env:CIRCLE_BUILD_URL}
+
+          # For GitHub Actions
+          AutomationBuildUrl: ${env:GITHUB_SERVER_URL}/${env:GITHUB_REPOSITORY}/actions/runs/${env:GITHUB_RUN_ID}
+
+      plugins:
+        - serverless-plugin-resource-tagging
+    ```
+
+Refer to the [tagging standard](../Reference/hosting-standards/tagging.md) for a full list of mandatory and optional tags.