FROM golang:1.13-alpine AS build_deps RUN apk add --no-cache git bzr WORKDIR /workspace ENV GO111MODULE=on COPY go.mod . COPY go.sum . RUN go mod download FROM build_deps AS build COPY . . RUN CGO_ENABLED=0 go build -o webhook -ldflags '-w -extldflags "-static"' . FROM alpine:3.9 RUN apk add --no-cache ca-certificates COPY --from=build /workspace/webhook /usr/local/bin/webhook ENTRYPOINT ["webhook"]