diff --git a/Dockerfile b/Dockerfile
index 13c35bf..02600ad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,8 +23,8 @@ RUN apk add --no-cache \
 
 USER mpv
 
-WORKDIR /home/mpv
+WORKDIR /home/mpv/media
 
 VOLUME ["/home/mpv/media"]
 
-CMD ["mpv"]
+CMD ["ash"]
diff --git a/README.md b/README.md
index c888fb9..5203517 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
-# mpv
+# How to use this image
+
+## Start an MPV instance
 
 ```sh
-docker run --rm \
+docker run --rm -i -t \
     --device /dev/dri \
     --network host \
     --shm-size 2g \
@@ -9,5 +11,8 @@ docker run --rm \
     -v /etc/machine-id:/etc/machine-id:ro \
     -v /run/user/1000/pulse:/run/user/1000/pulse \
     -v $HOME/.Xauthority:/home/mpv/.Xauthority \
+    -v /path/to/your/media/:/home/mpv/media:ro \
     mpv
 ```
+
+where `/path/to/your/media` is the directory of the media files that you want to play.