Update documentation

docs/azure.md

@@ -22,13 +22,44 @@
 
 ### Compulsory parameters
 
-- `"domain"`
-- `"host"` is your host and can be a subdomain or `"@"`
-- `"subscription_id"`
-- `"resource_group_name"`
-- `"zone_name"`
-- `"relative_record_set_name"`
+- `"domain"` for Web UI purposes only
+- `"host"` for Web UI purposes only
+- `"app_id"` see [the domain setup section](#Domain-setup)
+- `"app_password"` see [the domain setup section](#Domain-setup)
+- `"subscription_id"` found in the properties section of Azure DNS
+- `"resource_group_name"` found in the properties section of Azure DNS
+- `"relative_record_set_name"` **TODO**
+- `"zone_name"` found in the properties section of Azure DNS
 
 ### Optional parameters
 
+- `"ip_version"` can be `ipv4` (A records) or `ipv6` (AAAA records), defaults to `ipv4 or ipv6`
+
 ## Domain setup
+
+Thanks to @danimart1991 for describing the following steps!
+
+1. Create Domain
+1. Activate Azure DNS Zone for that domain
+1. Find the following parameters in the Properties section of Azure DNS:
+    - The name or URL `AnyNameOrUrl` for the query below **TODO**
+    - `subscription_id`
+    - `resource_group_name`
+    - `zone_name`
+1. In the Azure Console (inside the portal), run:
+
+    ```sh
+    az ad sp create-for-rbac -n "$AnyNameOrUrl" --scopes "/subscriptions/$subscription_id/resourceGroups/$resource_group_name/providers/Microsoft.Network/dnszones/$zone_name"
+    ```
+
+    This gives you the rest of the parameters:
+
+    ```json
+    {
+      "appId": "{app_id/client_id}",
+      "displayName": "not important",
+      "name": "not important",
+      "password": "{app_password}",
+      "tenant": "not important"
+    }
+    ```

internal/settings/azure.go

@@ -102,7 +102,6 @@ func (a *azure) HTML() models.HTMLRow {
 }
 
 func (a *azure) Update(ctx context.Context, client netlib.Client, ip net.IP) (newIP net.IP, err error) {
-	// https://docs.microsoft.com/en-us/rest/api/dns/recordsets/update#uri-parameters
 	recordType := A
 	if ip.To4() == nil {
 		recordType = AAAA