Merge branch 'qml' of https://github.com/raspberrypi/rpi-imager into qml

README.md

@@ -116,3 +116,30 @@ On Windows start the application with the command-line option --debug to let it
 
 If the application is started with "--repo [your own URL]" it will use a custom image repository.
 So can simply create another 'start menu shortcut' to the application with that parameter to use the application with your own images.
+
+### Telemetry
+
+In order to understand which images and operating systems are most popular and re-organise the application accordingly, when using the default image repository, the URL, operating system name and category (if present) of a selected image are sent to https://rpi-imager-stats.raspberrypi.org by [`downloadstatstelemetry.cpp`](https://github.com/raspberrypi/rpi-imager/blob/qml/downloadstatstelemetry.cpp).
+
+This web service is hosted by [Heroku](https://www.heroku.com) and only stores an incrementing counter using a [Redis Sorted Set](https://redis.io/topics/data-types#sorted-sets) for each URL, operating system name and category per day in the `eu-west-1` region and does not associate any personal data with those counts. This allows us to query the number of downloads over time and nothing else.
+
+The download counts are retained for 90 days and the last 1,500 requests to the service are logged for one week before expiring as this is the [minimum log retention period for Heroku](https://devcenter.heroku.com/articles/logging#log-history-limits).
+
+On Windows, you can opt out of telemetry by disabling it in the Registry:
+
+```
+reg add "HKCU\Software\Raspberry Pi\Imager\General" /v telemetry /t REG_DWORD /d 0
+```
+
+On Linux, add the following to `~/.config/Raspberry Pi/Imager.conf`:
+
+```ini
+[%General]
+telemetry=0
+```
+
+On macOS, disable it by editing the property list for the application:
+
+```
+defaults write org.raspberrypi.Imager.plist General.telemetry -bool NO
+```