Where's docker's daemon.json? (missing)

From [docs][1]: > The default location of the configuration file on Linux is > /etc/docker/daemon.json But I don't have it on my fresh docker installation: # docker --version Docker version 17.03.1-ce, build c6d412e # ls -la /etc/docker/ total 12 drwx------ 2 root root 4096 Apr 28 17:58 . drwxr-xr-x 96 root root 4096 Apr 28 17:58 .. -rw------- 1 root root 244 Apr 28 17:58 key.json # lsb_release -cs trusty [1]: https://docs.docker.com/engine/reference/commandline/dockerd//