Windows doesn't recognize Docker command
I had installed Docker 18.06.1-ce version on my Windows 10 machine and faced the similar issue, even though the docker was added the Windows %PATH%.
I moved the docker path to the bottom and that solved my problem.
I restarted the system, it worked, maybe we can say that a restart is required.
You need to start the docker first if you have not and then open powershell.
In the powershell, try to run docker commands.