Support Docker Desktop for Windows

[gmacario]

Environment:

• OS: Windows 10
• Docker Desktop Community for Windows

  
  gmaca@DESKTOP-4P2TSAL MINGW64 ~/Documents/github/gmacario/easy-jenkins (master)
  $ docker version
  Client: Docker Engine - Community
  Version:           19.03.2
  API version:       1.40
  Go version:        go1.12.8
  Git commit:        6a30dfc
  Built:             Thu Aug 29 05:26:49 2019
  OS/Arch:           windows/amd64
  Experimental:      false

Server: Docker Engine - Community Engine: Version: 19.03.2 API version: 1.40 (minimum version 1.12) Go version: go1.12.8 Git commit: 6a30dfc Built: Thu Aug 29 05:32:21 2019 OS/Arch: linux/amd64 Experimental: false containerd: Version: v1.2.6 GitCommit: 894b81a4b802e4eb2a91d1ce216b8817763c29fb runc: Version: 1.0.0-rc8 GitCommit: 425e105d5a03fabd737a126ad93d62a9eeede87f docker-init: Version: 0.18.0 GitCommit: fec3683

gmaca@DESKTOP-4P2TSAL MINGW64 ~/Documents/github/gmacario/easy-jenkins (master) $

* [Git for Windows]()

gmaca@DESKTOP-4P2TSAL MINGW64 ~ $ git --version git version 2.23.0.windows.1

gmaca@DESKTOP-4P2TSAL MINGW64 ~ $

* easy-jenkins master (b881b15969c6dd094c8db287aa00c9ec94e3bb2e)

When executing `start.sh` the following error is returned

gmaca@DESKTOP-4P2TSAL MINGW64 ~/Documents/github/gmacario/easy-jenkins (master) $ ./runme.sh No active host found INFO: Creating VirtualBox VM easy-jenkins (cpu:2, memory:2048 MB, disk:50000 MB) Running pre-create checks... Error with pre-create check: "VBoxManage not found. Make sure VirtualBox is installed and VBoxManage is in the path"

gmaca@DESKTOP-4P2TSAL MINGW64 ~/Documents/github/gmacario/easy-jenkins (master) $

Please adjust `runme.sh` to detect that Docker is running natively and do not search for VirtualBox instead