[td] Add docs for email alerting

Author: tommydangerous

Diff for: docs/README.md

@@ -43,7 +43,8 @@ Read more tech docs here. Got questions?
     - [Compute resource](production/compute_resource.md)
     - [Runtime variables](production/runtime_variables.md)
 - Monitoring and alerting
-    - [Status updates in Slack](monitoring/alerting/slack.md)
+    - [Status updates in Slack](monitoring/alerting/Slack.md)
+    - [Status updates in Email](monitoring/alerting/Email.md)
 
 ### Integrations
 - Compute

Diff for: docs/monitoring/alerting/Email.md

@@ -0,0 +1,48 @@
+# Email
+
+Get status updates sent to your email inbox.
+
+<img
+  alt="Email"
+  src="https://yourreclaimedlife.com/wp-content/uploads/2018/12/email-marketing-without-permission.jpg"
+/>
+
+## Configure email settings
+
+In the root of your project’s folder (e.g. `default_repo/`), open the file `metadata.yaml`.
+
+> Project folder name
+>
+> If you initialized Mage using a different project name, then your root folder will be named
+differently. `default_repo` is the default project name if you didn’t customize it.
+
+In the `default_repo/metadata.yaml` file, add a section with the following configuration:
+
+```yaml
+notification_config:
+  email_config:
+    smtp_host: ...
+    smtp_mail_from: ...
+    smtp_user: ...
+    smtp_password: ...
+    to_emails:
+      - [email protected]
+      - [email protected]
+```
+
+Change the values for each key under the `email_config` section.
+
+<br />
+
+## What next?
+
+Whenever a pipeline run is successfully completed or fails,
+an email will be delivered to all the inboxes listed under `to_emails`.
+
+Here is an example of what an email could look like:
+
+| |
+| --- |
+| Successfully ran Pipeline `example_pipeline` with Trigger 79 `hourly_trigger` at execution time `2022-09-28 19:00:00`.<br />Open http://localhost:6789/pipelines/example_pipeline/triggers/79 to check pipeline run results and logs. |
+
+<br />