Document change detection widget

docs/configuration.md

@@ -19,6 +19,7 @@
   - [Repository](#repository)
   - [Bookmarks](#bookmarks)
   - [Calendar](#calendar)
+  - [ChangeDetection.io](#changedetectionio)
   - [Clock](#clock)
   - [Markets](#markets)
   - [Twitch Channels](#twitch-channels)
@@ -1109,6 +1110,53 @@ Whether to open the link in the same tab or a new one.
 
 Whether to hide the colored arrow on each link.
 
+### ChangeDetection.io
+Display a list watches from changedetection.io.
+
+Example
+
+```yaml
+- type: change-detection
+  instance-url: https://changedetection.mydomain.com/
+  token: ${CHANGE_DETECTION_TOKEN}
+```
+
+Preview:
+
+![](images/change-detection-widget-preview.png)
+
+#### Properties
+
+| Name | Type | Required | Default |
+| ---- | ---- | -------- | ------- |
+| instance-url | string | no | `https://www.changedetection.io` |
+| token | string | no |  |
+| limit | integer | no | 10 |
+| collapse-after | integer | no | 5 |
+| watches | array of strings | no |  |
+
+##### `instance-url`
+The URL pointing to your instance of `changedetection.io`.
+
+##### `token`
+The API access token which can be found in `SETTINGS > API`. Optionally, you can specify this using an environment variable with the syntax `${VARIABLE_NAME}`.
+
+##### `limit`
+The maximum number of watches to show.
+
+##### `collapse-after`
+How many watches are visible before the "SHOW MORE" button appears. Set to `-1` to never collapse.
+
+##### `watches`
+By default all of the configured watches will be shown. Optionally, you can specify a list of UUIDs for the specific watches you want to have listed:
+
+```yaml
+  - type: change-detection
+    watches:
+      - 1abca041-6d4f-4554-aa19-809147f538d3
+      - 705ed3e4-ea86-4d25-a064-822a6425be2c
+```
+
 ### Clock
 Display a clock showing the current time and date. Optionally, also display the the time in other timezones.