add

docker/introduction.md

@@ -445,6 +445,23 @@ docker run --rm busybox echo hello world
 docker container ls -a      # the container was not left around
 ```
 
+## Run container mount external disk
+{id: run-container-mound-external-disk}
+
+
+```
+docker run --rm "-v%CD%:/opt" -w /opt -it busybox
+```
+
+* -w to set the default workdir inside the container
+* -v to mount an external folder to an internal folder
+* %CD% is the current folder in Windows (outside)
+* /opt is the folder inside
+* We need double-quotes around it as the currecnt working directory on windows can contain spaces and other special characters.
+* --rm to remove the container at the end of the run
+* -it interactive mode
+
+
 ## List and remove images
 {id: list-and-remove-images}
 {i: images}