docs: add instructions for the sentry setup (#2441)

docs/admin-manual/monitoring.md

@@ -0,0 +1,26 @@
+---
+title: Monitoring
+sidebar_position: 85
+---
+
+This page provide some guidance to monitor LibreTime.
+
+## Sentry
+
+To gather and remotely monitor exceptions that may occur in your installation, you can use the Sentry library shipped in LibreTime to send reports to any Sentry compatible server ([Sentry](https://sentry.io/), [Glitchtip](https://glitchtip.com/)).
+
+To configure Sentry in LibreTime, you need to:
+
+- install the LibreTime Python packages with the `sentry` extra (the container images already ship the sentry extra),
+
+  ```bash
+  # Inside the LibreTime source dir
+  sudo pip install ./analyzer[sentry]
+  sudo pip install ./api[prod,sentry]
+  sudo pip install ./playout[sentry]
+  sudo pip install ./worker[sentry]
+  ```
+
+- set the [`SENTRY_DSN`](https://docs.sentry.io/product/sentry-basics/dsn-explainer/) environment variable on each of the LibreTime services you want to monitor.
+
+See the [Sentry Python SDK configuration options documentation](https://docs.sentry.io/platforms/python/configuration/options/) to further configure your setup.