Jenkins Container is missing Docker Engine?

Hi!

When building the docker container inside the jenkins pipeline, it fails complaining:

[workspace] $ /bin/sh -xe /tmp/hudson8789288389025626493.sh
- sudo /usr/bin/docker build -t edmp-config-server .
  sudo: /usr/bin/docker: command not found
  Build step 'Execute shell' marked build as failure

Looks like docker is not available inside the jenkins container, does it?
