Update README.md

Co-authored-by: Richard Gibson <richard.gibson@gmail.com>

Author: t3chguy

README.md

@@ -174,7 +174,7 @@ The Docker image can be used to serve element-web as a web server. The easiest w
 it is to use the prebuilt image:
 
 ```bash
-docker run -p 127.0.0.1:80:80 vectorim/element-web
+docker run --rm -p 127.0.0.1:80:80 vectorim/element-web
 ```
 
 A server can also be made available to clients outside the local host by omitting the