update readme

README.md

@@ -78,15 +78,14 @@ You can use the following alias:
 > add this to your ``~/.bash_alias`` file
 
 ```sh
-function docker_helper_run() {
+function docker_helper_up() {
   command cd ~/git/$1
-  docker-compose rm -f "$1"
-  docker-compose run -d --name "$1" "$@"
+  docker-compose up -d "$1"
   command cd ~-
 }
 
 function steam() {
-  docker_helper_run "$FUNCNAME" "$@"
+  docker_helper_up "$FUNCNAME" "$@"
 }
 ```