timestamp/protobuf question

docker-compose.yml

version: "3"
services:
  go:
    build: .
    working_dir: /go/src
    volumes:
      - .:/go/src
    command: protoc --go_out=. eg.proto

Dockerfile

FROM golang:alpine

RUN apk add --no-cache git make protobuf
RUN go get github.com/golang/protobuf/protoc-gen-go

eg.proto

syntax = "proto3";

package eg;

import "google/protobuf/timestamp.proto";

message Timestamped {
  google.protobuf.Timestamp stamp = 1;
  int32 count = 2;
}

What should I do to get it to reference the google.protobuf.Timestamp definition?

Running protoc --go_out=. eg.proto current gives this error:

$ docker-compose run go
google/protobuf/timestamp.proto: File not found.
eg.proto: Import "google/protobuf/timestamp.proto" was not found or had errors.
eg.proto:8:3: "google.protobuf.Timestamp" is not defined.

I've scanned the entire filesystem of that image and timestamp.proto doesn't exist anywhere on it, does it need other packages and command line arguments

Doing an apk add protobuf-dev will fix this issue.