Feat: support Aliyun (#252)

Co-authored-by: Jack Wang <jack.wang@hp.com>

Fixes #234 and #198 
Closes #209

docs/aliyun.md

@@ -0,0 +1,35 @@
+# Aliyun
+
+## Configuration
+
+### Example
+
+```json
+{
+  "settings": [
+    {
+      "provider": "aliyun",
+      "domain": "domain.com",
+      "host": "@",
+      "access_key_id": "your access_key_id",
+      "access_secret": "your access_secret",
+      "region": "your region",
+      "ip_version": "ipv4"
+    }
+  ]
+}
+```
+
+### Compulsory parameters
+
+- `"domain"`
+- `"host"` is your host and can be a subdomain or `"@"`
+- `"access_key_id"`
+- `"access_secret"`
+
+### Optional parameters
+
+- `"ip_version"` can be `ipv4` (A records) or `ipv6` (AAAA records), defaults to `ipv4 or ipv6`
+- `"region"` is your region, which defaults to `cn-hangzhou` if not set.
+
+## Domain setup