fix(Dockerfile): deisctl is a static binary

    ~
    --> ldd deisctl
    	not a dynamic executable

Author: Xe

Dockerfile

@@ -1,4 +1,5 @@
 FROM deis/base
+ENV CGO_ENABLED 0
 ADD https://storage.googleapis.com/golang/go1.3.linux-amd64.tar.gz /tmp/
 RUN tar -C /usr/local -xzf /tmp/go1.3.linux-amd64.tar.gz
 RUN apt-get update && apt-get install -yq git mercurial
@@ -11,8 +12,7 @@ ADD deis-version /tmp/package/etc/deis-version
 ENV GOPATH /go:/go/src/github.com/deis/deisctl/Godeps/_workspace
 WORKDIR /go/src/github.com/deis/deisctl
 RUN go get github.com/tools/godep
-#RUN go get -v ./... && go install -v ./...
-RUN godep go install -v ./...
+RUN godep go install -v -a -ldflags '-s' ./...
 RUN mkdir -p /tmp/package/opt/bin && cp /go/bin/deisctl /tmp/package/opt/bin/deisctl
 RUN tar -C /tmp/package -czf /tmp/deisctl.tar.gz .
 ENTRYPOINT ["/go/bin/deisctl"]