From b4736c46685ab5c7c5c3d11b9b5a5fc31495057a Mon Sep 17 00:00:00 2001
From: Tyler Yahn <MrAlias@users.noreply.github.com>
Date: Thu, 19 Oct 2023 10:18:24 -0700
Subject: [PATCH] Update Dockerfile (#395)

* Use golang:1.21.3-bullseye as base build image

* Remove TARGETARCH arg from Dockerfile
---
 Dockerfile | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index f2a1b92fd..3b11bf39b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,14 @@
-FROM debian:12 as builder
-ARG TARGETARCH
-RUN apt-get update && apt-get install -y curl clang gcc llvm make libbpf-dev -y
-RUN curl -LO https://go.dev/dl/go1.20.linux-${TARGETARCH}.tar.gz && tar -C /usr/local -xzf go*.linux-${TARGETARCH}.tar.gz
-ENV PATH="/usr/local/go/bin:${PATH}"
+FROM golang:1.21.3-bullseye as builder
+
 WORKDIR /app
+
+RUN apt-get update && apt-get install -y curl clang gcc llvm make libbpf-dev
+
+# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading
+# them in subsequent builds if they change
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
 COPY . .
 RUN make build