## build image:
FROM golang:1.19.3-bullseye AS builder

ENV DEBIAN_FRONTEND noninteractive
RUN apt update && apt install -y make bzip2 curl unzip
RUN mkdir -p /build
WORKDIR /build

# install newer protoc
RUN wget https://github.com/protocolbuffers/protobuf/releases/download/v21.10/protoc-21.10-linux-aarch_64.zip && \
    unzip *.zip -d /usr/local && rm -v *.zip && protoc --version

RUN go install -v google.golang.org/protobuf/cmd/protoc-gen-go@v1.28.1

RUN go env

COPY ./go.mod .
COPY ./go.sum .

RUN --mount=type=cache,target=/go/pkg go mod download -x
RUN rm -rfv /var/cache/* /var/tmp/*