Add documentation for new intended feature

dnnrly · Jun 19, 2022 · 3157554 · 3157554
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commit 3157554
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diff --git a/README.md b/README.md
@@ -50,10 +50,20 @@ $ wait-for http://your-service-here:8080/health https://another-service/
 ``` 
 
 ### Waiting for gRPC services
+
 ```shell script
 $ wait-for grpc-server:8092 other-grpc-server:9091
 ```
 
+### Waiting for DNS changes
+
+```shell script
+$ wait-for dns:google.com
+```
+
+This will wait for the list of IP addresses bound to that DNS name to be
+updated, regardless of order.
+
 ### Preconfiguring services to connect to
 
 ```shell script