Add a Dockerfile for building and testing.

Signed-off-by: Daniel Nephin <dnephin@gmail.com>

cmd/docker/docker_windows.go

@@ -3,7 +3,7 @@ package main
 import (
 	"sync/atomic"
 
-	_ "github.com/docker/docker/autogen/winresources/docker"
+	_ "github.com/docker/cli/autogen/winresources"
 )
 
 //go:cgo_import_dynamic main.dummy CommandLineToArgvW%2 "shell32.dll"

dockerfiles/Dockerfile.build

@@ -0,0 +1,16 @@
+
+FROM    golang:1.8-alpine
+
+RUN     apk add -U git
+
+RUN     go get github.com/LK4D4/vndr && \
+        cp /go/bin/vndr /usr/bin && \
+        rm -rf /go/src/* /go/pkg/* /go/bin/*
+
+RUN     go get github.com/mitchellh/gox && \
+        cp /go/bin/gox /usr/bin && \
+        rm -rf /go/src/* /go/pkg/* /go/bin/*
+
+ENV     CGO_ENABLED=0
+WORKDIR /go/src/github.com/docker/cli
+CMD     sh