Update repo guidelines with CLOMonitor instructions (#1346)

.github/ISSUE_TEMPLATE/new-repo.md

@@ -67,3 +67,5 @@ _You may not be able to use the Projects quick menu on this page. In that case,
    requiring `tide` to pass before PRs are merged.
 
 - [ ] (optional) Send a PR adding the repo to [knobots](https://github.com/knative-sandbox/knobots).
+
+- [ ] (optional) Send a PR adding the repo to [CLOMonitor](https://clomonitor.io/projects/cncf/knative) ([more information](/REPOSITORY-GUIDELINES.md#clomonitor-and-clotributor)).

REPOSITORY-GUIDELINES.md

@@ -202,6 +202,32 @@ should be archived, deleted, or moved out of the `knative-sandbox` organization,
 following the general [Procedure for Removal](#procedure-for-removal) for
 repositories.
 
+## CLOMonitor and CLOTributor
+
+[CLOMonitor](https://clomonitor.io/) is a CNCF tool that periodically checks open source projects repositories to verify they meet certain project health best practices.
+
+[CLOTributor](https://clotributor.dev/) is a CNCF tool that makes it easier to discover great opportunities to become a Cloud Native contributor.
+
+When a new repository is created, consider adding it to CLOMonitor [data file](https://github.com/cncf/clomonitor/blob/main/data/cncf.yaml), similar to:
+
+```yaml
+    - name: eventing
+      url: https://github.com/knative/eventing
+      check_sets:
+        - code-lite
+```
+
+This will make the repository will be listed in CLOMonitor's Knative project [health report](https://clomonitor.io/projects/cncf/knative). It will also make CLOTributor to list `good-first-issue`s of the new repository.
+
+If you would like to exclude the repository from the health report but have the `good-first-issues` in CLOTributor, add following the field:
+
+```yaml
+      exclude:
+        - clomonitor
+```
+
+Based on the maturity of the repository, it is possible to use different `check_sets`. See CLOMonitor's [checks documentation](https://github.com/cncf/clomonitor/blob/main/docs/checks.md) for more information.
+
 ---
 
 Contents of this page are adopted from the

mechanics/CREATING-A-SANDBOX-REPO.md

@@ -93,3 +93,5 @@ other WGs to review and approve impacting changes.
    - Under "Branches" add a branch protection rule for `main`:
      - Require status checks to pass (except `...-go-coverage` checks)
      - Include administrators
+
+1. Encourage repository sponsor to add the repository to [CLOMonitor](https://clomonitor.io/projects/cncf/knative) ([more information](/REPOSITORY-GUIDELINES.md#clomonitor-and-clotributor)).