Created Notify_dingtalk (markdown)

Notify_dingtalk.md

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+## DingTalk
+* **Source**: https://www.dingtalk.com/
+* **Icon Support**: No
+* **Message Format**: Text
+* **Message Limit**: 160 Characters per message
+
+### Account Setup
+To use DingTalk, you will need to acquire your _API Key_.
+
+### Syntax
+Valid syntax is as follows:
+
+* `dingtalk://{ApiKey}/{ToPhoneNo}`
+* `dingtalk://{ApiKey}/{ToPhoneNo1}/{ToPhoneNo2}/{ToPhoneNoN}`
+* `dingtalk://{Secret}@{ApiKey}/{ToPhoneNo}`
+* `dingtalk://{Secret}@{ApiKey}/{ToPhoneNo1}/{ToPhoneNo2}/{ToPhoneNoN}`
+
+### Parameter Breakdown
+| Variable        | Required | Description
+| --------------- | -------- | -----------
+| ApiKey         | Yes      | The _API Key_ associated with your DingTalk account.  This is available to you via the DingTalk Dashboard.
+| ToPhoneNo      | No       | A phone number to send your notification to
+| Secret         | No       | The optional secret key to associate with the message signing
+
+#### Example
+Send a DingTalk Notification as an SMS:
+```bash
+# Assuming our {APIKey} is gank339l7jk3cjaE
+# Assuming our {ToPhoneNo} - is in the US somewhere making our country code +1
+#                            - identifies as 1-123-555-1223
+apprise -vv -t "Test Message Title" -b "Test Message Body" \
+   dingtalk://gank339l7jk3cjaE/11235551223
+
+# the following would also have worked (spaces, brackets,
+# dashes are accepted in a phone no field):
+apprise -vv -t "Test Message Title" -b "Test Message Body" \
+   dingtalk://gank339l7jk3cjaE/1-(123) 555-1223
+```