dev/setup: adding glide via package

Glide install script hits GitHub API and can get rate limit errors on CI. I also had to add build-base because alpine 3.5 go now depends on gcc et al

Signed-off-by: Jeff Lindsay <[email protected]>

dev/setup/Dockerfile

@@ -2,10 +2,9 @@
 # from scratch. Building this with `make test-env` will show missing dependencies
 # and help clarify what software is necessary for a new development setup.
 
-FROM alpine:3.4
-RUN apk --update add go curl make bash git ca-certificates
+FROM alpine:3.5
+RUN apk --update add go curl make bash git build-base ca-certificates glide
 ENV GOPATH /usr/local
-RUN curl -LSs https://glide.sh/get | sh
 COPY . /usr/local/src/github.com/gliderlabs/comlab
 WORKDIR /usr/local/src/github.com/gliderlabs/comlab
 RUN make install && comlab