From 40daf21cf7f79370df14b29980d533510e0bea7a Mon Sep 17 00:00:00 2001
From: Patrick Kuijvenhoven <patrick.kuijvenhoven@gmail.com>
Date: Wed, 5 Jun 2024 20:59:10 +0200
Subject: [PATCH] feat(docker): Improve Dockerfile

- include build process in Dockerfile
- use multistage build process
---
 Dockerfile | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ac8a284..e4c279a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,26 @@
-FROM scratch
+# syntax=docker/dockerfile:1
+# Based on https://docs.docker.com/language/golang/build-images/#multi-stage-builds
+
+# Build the application from source
+FROM golang:1.22
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY *.go ./
+
+ARG CGO_ENABLED=0
+ARG GOARCH=amd64
+ARG GOOS=linux
+RUN go build -ldflags '-s -w' -trimpath -o /docker-etchosts
+
+# Deploy the application binary into a lean image
+FROM scratch AS build-release-stage
+
+WORKDIR /
+
+COPY --from=0 /docker-etchosts /docker-etchosts
+
 ENTRYPOINT ["/docker-etchosts"]
-COPY docker-etchosts /