DM readme (#21926)

* dm readme

* raw logs

* little mroe
old-commit-hash: 9e0bbab9ed

selfdrive/monitoring/README.md

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+# driver monitoring (DM)
+
+Uploading driver-facing camera footage is opt-in, but it is encouraged to opt-in to improve the DM model. You can always change your preference using the "Record and Upload Driver Camera" toggle.
+
+## Troubleshooting
+
+Before creating a bug report, go through these troubleshooting steps.
+
+* Ensure the driver-facing camera has a good view of the driver in normal driving positions.
+ * This can be checked in Settings -> Device -> Preview Driver Camera (when car is off).
+* If the camera can't see the driver, the device should be re-mounted.
+
+## Bug report
+
+In order for us to look into DM bug reports, we'll need the driver-facing camera footage. If you don't normally have this enabled, simply enable the toggle for a single drive. Also ensure the "Upload Raw Logs" toggle is enabled before going for a drive.