Merge pull request #102967 from onalante-msft/private-registry-auth

[iot-edge] Add registry authentication step and fix parameter typo

Author: jborsecnik

articles/iot-edge/production-checklist.md

@@ -251,9 +251,18 @@ The following steps illustrate how to pull a Docker image of **edgeAgent** and *
 
 1. In the text editor, change your image values under `[agent.config]`. Replace the values in brackets with your own.
 
-   ```bash
+   ```toml
    [agent.config]
-   Image = "<registry-name/server>/azureiotedge-agent:1.4"
+   image = "<registry-name/server>/azureiotedge-agent:1.4"
+   ```
+
+1. If your private registry requires authentication, set the authentication parameters in `[agent.config.auth]`.
+
+   ```toml
+   [agent.config.auth]
+   serveraddress = "<login-server>" # Almost always equivalent to <registry-name/server>
+   username = "<username>"
+   password = "<password>"
    ```
 
 1. Save your changes and exit your text editor.
@@ -531,4 +540,4 @@ These constraints can be applied to individual modules by using create options i
 ## Next steps
 
 * Learn more about [IoT Edge automatic deployment](module-deployment-monitoring.md).
-* See how IoT Edge supports [Continuous integration and continuous deployment](how-to-continuous-integration-continuous-deployment.md).
+* See how IoT Edge supports [Continuous integration and continuous deployment](how-to-continuous-integration-continuous-deployment.md).