Fix Docker's "exec user process caused no such file or directory" error (#1)

* Produce statically linked binary to avoid dynamic library issues

* No need to "go get"

Author: edigaryev

Dockerfile

@@ -3,12 +3,11 @@ FROM golang:latest as builder
 WORKDIR /build
 ADD . /build
 
-RUN go get -t -v ./... && \
-    go build -o azure-blob-storage-proxy ./cmd/
+RUN CGO_ENABLED=0 go build -o azure-blob-storage-proxy ./cmd/
 
 FROM alpine:latest
 LABEL org.opencontainers.image.source=https://github.com/cirruslabs/azure-blob-storage-proxy/
 
 WORKDIR /svc
 COPY --from=builder /build/azure-blob-storage-proxy /svc/
-ENTRYPOINT ["/svc/azure-blob-storage-proxy"]
+ENTRYPOINT ["/svc/azure-blob-storage-proxy"]