"docker-machine create" gives connection attempt failed error when run from behind a corporate proxy

I am new to docker and am trying to create a docker host using the docker-machine create [name] command on Windows 7 but I always get a connection attempt failed error. I added the HTTP_PROXY and HTTPS_PROXY to Docker Toolbox\start.sh but that did not help

Also tried :

--engine-env HTTP_PROXY=http://proxy IP:port CLI option for docker-machine create command
Windows powershell command $env:HTTP_PROXY=http://proxy IP:port to set the environment variable at global level

But none of these have resolved the issue.

docker-machine version and the error:

C:\Windows\system32> docker-machine -v

docker-machine.exe version 0.14.0, build 89b8332

C:\Windows\system32> docker-machine create node-1

(node-1) Unable to get the latest Boot2Docker ISO release version: Get https://api.github.com/repos/boot2docker/boot2docker/releases/latest: dial tcp 192.30.253.116:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

Solution

Since there was no response to my query above I uninstalled docker toolbox and installed docker on a VM. It is working perfectly now. I have written an article on Medium for all you are trying this for the first time and need help in setting up Docker on Win7 behind a corporate proxy. The article can be found here : https://medium.com/@uvnikgupta/installing-docker-on-win7-pc-79db4217bbae