housekeeping: add static distribution file documentation (#5095)

Co-authored-by: kyle shockey <kyle.shockey1@gmail.com>

docs/usage/installation.md

@@ -83,7 +83,7 @@ This will serve Swagger UI at `/swagger` instead of `/`.
 
 For more information on controlling Swagger UI through the Docker image, see the Docker section of the [Configuration documentation](configuration.md#docker).
 
-### unpkg
+### unpkg 
 
 You can embed Swagger UI's code directly in your HTML by using unpkg's interface:
 
@@ -93,3 +93,7 @@ You can embed Swagger UI's code directly in your HTML by using unpkg's interface
 ```
 
 See [unpkg's main page](https://unpkg.com/) for more information on how to use unpkg.
+
+### Static files without HTTP or HTML
+
+Once swagger-ui has successfully generated the `/dist` directory, you can copy this to your own file system and host from there.