Sample docker multistage file with Go

go-dep-multistage.Dockerfile

FROM golang:alpine AS builder

# install packages
RUN apk add --no-cache curl git

# https://golang.github.io/dep/docs/FAQ.html#how-do-i-use-dep-with-docker
RUN curl -fsSL -o /usr/local/bin/dep https://github.com/golang/dep/releases/download/v0.5.0/dep-linux-amd64 && chmod +x /usr/local/bin/dep
RUN mkdir -p $APP_PATH
WORKDIR $APP_PATH
COPY Gopkg.toml Gopkg.lock ./
RUN dep ensure -vendor-only

# add the code and compile it into a static binary
ADD . ./
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /app .

# use multistage to copy the binary from the builder stage to a scratch image
FROM scratch
COPY --from=builder /app ./
ENTRYPOINT ["./app"]