Updates deployment README.md for updating secrets yaml

Author: marshallmcdonnell

deployment/README.md

@@ -12,3 +12,14 @@ These are stored as Github secrets.
 
 - `LINODE_B64_KUBECONFIG` - base64-encoded Kubeconfig for the Kubernetes cluster
 - `LINODE_B64_SECRET_VALUES` - base64-encoded secret values we apply additionally to the deployment
+
+
+### Secrets values yaml file
+
+To update `LINODE_B64_SECRET_VALUES`, use `examples.secrets-values.yaml` as a template for new yaml (say `new-secrets.yaml`) and...
+  1. Update the passwords secrets where `CHANGEME` occurs
+    - To create random, you can use: `python -c "import secrets; print(secrets.token_urlsafe())"`
+  2. Base64 encode the yaml file: `base64 new-secret.yaml`
+  3. Update the GitHub Actions `LINODE_B64_SECRET_VALUES` with this encoded string from step (2):
+    - link: https://github.com/nsdf-fabric/NSDF-INTERSECT/settings/secrets/actions
+  4. Save changes!