Document and template "customers_secret" option

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

USER_GUIDE.md

@@ -357,6 +357,12 @@ You can start out by using the Staging issuer, then switch to the production iss
 
 > Note if you want to switch from the staging TLS certificates to production certificates, see the appendix.
 
+### Use a Kubernetes secret instead of a customers URL (optional)
+
+If you want to keep your list of users private, you can use a Kubernetes secret instead.
+
+Set `customers_secret:` to `true` and then edit the two secrets `customers` and `of-customers`.
+
 ### Enable dockerfile language support (optional)
 
 If you are planning on building functions using the `dockerfile` template you need to set `enable_dockerfile_lang: true`.
@@ -458,6 +464,7 @@ http://system.example.com/dashboard/<username>
 
 Just replace `<username>` with your GitHub account. 
 > If you have enabled OAuth you only need to navigate to system.example.com
+
 ## Trigger a build
 
 Now you can install your GitHub app on a repo, run `faas-cli new` and then rename the YAML file to `stack.yml` and do a `git push`. Your OpenFaaS Cloud cluster will build and deploy the functions found in that GitHub repo.

templates/edge-auth-dep.yml

@@ -51,7 +51,7 @@ spec:
           - name: private_key_path
             value: "/var/secrets/private/key"
           - name: customers_path
-            value: "/var/secrets/of-customers/of-customers"
+            value: "{{.OFCustomersSecretPath}}"
 # Update for your configuration:
           - name: client_secret # this can also be provided via a secret named of-client-secret
             value: ""

templates/gitlab.yml

@@ -19,7 +19,7 @@ functions:
       read_debug: true
       installation_tag: "openfaas-cloud"
       gitlab_instance: "{{.GitLabInstance}}"
-      customers_path: {{.CustomersSecretPath}}
+      customers_path: "{{.CustomersSecretPath}}"
     environment_file:
       - gateway_config.yml
     secrets: