Fixes Rockerbuild

Go shall only download not build as sources are in the src folder

Author: aacebedo

Rockerfile

@@ -41,12 +41,12 @@ ENV CGO_ENABLED=0
 
 RUN go get -v github.com/tools/godep
 
-
+RUN mkdir -p /go/src/github.com/tonistiigi/dnsdock
+WORKDIR /go/src/github.com/tonistiigi/dnsdock
 {{if .SRCDIR}}
   MOUNT {{$SRCDIR}}:/go/src/github.com/tonistiigi/dnsdock
 {{else}}
-  RUN go get github.com/tonistiigi/dnsdock
-  WORKDIR /go/src/github.com/tonistiigi/dnsdock
+  RUN git clone https://github.com/tonistiigi/dnsdock /go/src/github.com/tonistiigi/dnsdock 
   RUN git checkout {{$GIT_COMMIT}}
 {{end}}