Add a README for deploy

deploy/README.md

@@ -0,0 +1,16 @@
+# Deploying the InfluxData Docs
+
+Use the following command to deploy a CloudFormation stack using the template in this directory.
+
+```sh
+aws cloudformation deploy \
+    --template-file docs-website.yml \
+    --stack-name="${STACK_NAME}" \
+    --capabilities CAPABILITY_IAM /
+    --no-execute-changeset \
+    --parameter-overrides \
+        AcmCertificateArn="${ACM_ARN}" \
+        DomainName="${DOMAIN_NAME}"
+```
+
+The `--no-execute-changeset` option will display the actions that will be taken. Remove the `--no-execute-changeset` option to actually deploy a change.