add intitial healthcheck docs

docs/docs/how-tos/setup-healthcheck.md

@@ -0,0 +1,25 @@
+# Overview
+
+Nebari integrates [Kuberhealthy](https://kuberhealthy.github.io/kuberhealthy/) to perform internal healthchecks on Nebari. This is an extensible Kubernetes native framework for continuous synthetic testing. Kuberhealthy is set up to export metrics to
+
+# Enabling
+
+Healthchecks are currently considered a beta feature that we are testing. Due to this, they are disabled by default. To enable healthchecks, add the following configuration under the `monitoring` configuration in your `nebari-config.yaml`.
+
+```yaml
+monitoring:
+  healthchecks:
+    enabled: true
+```
+
+# Checking Healthcheck statuses
+
+All healthchecks are exported as metrics to Prometheus and can be viewed in Grafana.
+
+For example: To see the uptime for the conda-store service, you can run:
+
+`1 - (sum(count_over_time(kuberhealthy_check{check="dev/conda-store-http-check", status="0"}[30d])) OR vector(0))/(sum(count_over_time(kuberhealthy_check{check="dev/conda-store-http-check", status="1"}[30d])) * 100)`
+
+in Grafana, which will show you the following chart.
+
+![Grafana chart showing the uptime for conda store](/img/how-tos/nebari-healthchecks.png)

docs/sidebars.js

@@ -79,6 +79,7 @@ module.exports = {
         "how-tos/nebari-extension-system",
         "how-tos/telemetry",
         "how-tos/setup-monitoring",
+        "how-tos/setup-healthcheck",
         "how-tos/access-logs-loki",
         "how-tos/use-gpus",
         "how-tos/develop-local-packages",