Added example for using image digest in the docker run command
Added explanation for the example with image's digest ( as per 's comment
Wrapped to ~80 chars
@@ -190,6 +190,11 @@ Images using the v2 or later image format have a content-addressable identifier
called a digest. As long as the input used to generate the image is unchanged,
the digest value is predictable and referenceable.
+The following example runs a container from the `alpine` image with the
+`sha256:9cacb71397b640eca97488cf08582ae4e4068513101088e9f96c9814bfda95e0` digest:
+
+ $ docker run alpine@sha256:9cacb71397b640eca97488cf08582ae4e4068513101088e9f96c9814bfda95e0 date
+
## PID settings (--pid)
--pid="" : Set the PID (Process) Namespace mode for the container,
