Can't start server by 'advisor_admin server start'

[amugear]

Ubuntu 16.04.4 LTS
python 3.5.2
advisor 0.1.5.1

I installed advisor with pip3, but can't start any server.
There is no docker on my OS, and I think docker is not necessary according the doc.

% advisor_admin server start 
Are you sure to run server container(Y/N): Y
Try to start the server with container
Run the command: docker run -d -p 8000:8000 tobegit3hub/advisor
/bin/sh: 1: docker: not found
Fail to run server, exit code: 127

% advisor_admin server start
Are you sure to run server container(Y/N): N
Cancel operation

[tobegit3hub]

It needs docker to start the server.

Please install docker before running advisor_admin server start .

[hangelwen]

@tobegit3hub One has to install docker for the server to run? This is not clear in README. Readme says either "Run server with official package" or "run with official docker image"

[tobegit3hub]

Since we don't want user to install extra dependencies to run server. advisor_admin server start will use the pre-built docker image to run. We may add more information for users if they have not installed docker.