fixing dockerfile

Author: lleadbet

Dockerfile

@@ -1,5 +1,5 @@
 FROM karalabe/xgo-latest
 RUN apt-get update && apt-get install curl -y
 RUN curl -sfL https://install.goreleaser.com/github.com/goreleaser/goreleaser.sh | sh
-ENV GOPROXY=direct
+
 ENTRYPOINT ["goreleaser"]