Golang Microservice Dockerfile boilerplate

Dockerfile

FROM golang:1.10.2-alpine3.7 AS builder

ARG GITLAB_TOKEN
ARG GITLAB_DOMAIN

RUN apk update \
 && apk add git

RUN mkdir -p /go/src \
 && mkdir -p /go/bin \
 && mkdir -p /go/pkg

ENV GOPATH=/go
ENV PATH=$GOPATH/bin:$PATH

RUN mkdir -p $GOPATH/src/app
ADD . $GOPATH/src/app

ADD . /go/src

WORKDIR $GOPATH/src/app

# go get uses git to pull lib dependencies
RUN git config --global url."https://oauth2:$GITLAB_TOKEN@$GITLAB_DOMAIN".insteadOf "https://$GITLAB_DOMAIN"

RUN go get .
RUN go get github.com/json-iterator/go
RUN CGO_ENABLED=0 go build -tags=jsoniter -a -installsuffix cgo -o /go/bin/server .

FROM alpine:3.7

WORKDIR /

COPY --from=builder /go/bin/server /server
ENTRYPOINT ["/server"]