add quiet mode to single cluster doc

docs/getting-started-single-cluster.md

@@ -22,6 +22,17 @@ In this quick start, we will cover:
 |------------------------------|-----------------------------|-------------------------------------------------------------------------------------------------------------|
 | `ISTIO_INSTALL_SAIL`       | `true`       | Whether to install istio through project sail, default `false`                                                                                |
 
+
+### Quiet Mode
+
+Quiet mode is useful for when you wish to run the script uninterrupted. Below outlines the env vars needed to use quiet mode. These flags can be set alongside other env vars listed below to take advantage of their features:
+
+| Env Var | Example Value | Description |
+|---------|---------------|-------------|
+| `KUADRANT_QUIET` | `true` | Runs uninterrupted quickstart in single cluster mode with no DNS provider if set on its own .|
+| `DNS_PROVIDER` | `true` | Runs uninterrupted quickstart in single cluster mode with DNS provider if set alongside `KUADRANT_QUIET` . |
+| `MULTICLUSTER` | `true` | Runs quickstart uninterrupted in multicluster mode with DNS provider if `DNS_PROVIDER` and `KUADRANT_QUIET` are set; otherwise, runs without DNS provider if only `KUADRANT_QUIET` is set. |
+
 If you want to make use of the Kuadrant `DNSPolicy` you should setup the following environmental variables depending on your DNS Provider:
 
 ### AWS