From b66f9b5cf5d309a3130d30f6b9f0bac67828b165 Mon Sep 17 00:00:00 2001
From: Steven Tang <steven@steventang.net>
Date: Mon, 3 Jan 2022 12:01:29 +1100
Subject: [PATCH] perf: separate download stage in Dockerfile

---
 Dockerfile | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 9a8affd..f08c850 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,26 @@
-# Build Stage
+# To build locally: docker buildx build . -t wakapi --load
 
-FROM golang:1.16-alpine AS build-env
+# Preparation to save some time
+FROM --platform=$BUILDPLATFORM golang:1.16-alpine AS prep-env
 WORKDIR /src
 
-# Required for go-sqlite3
-RUN apk add --no-cache gcc musl-dev
-
 ADD ./go.mod .
 RUN go mod download
+ADD . .
 
 RUN wget "https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh" -O wait-for-it.sh && \
     chmod +x wait-for-it.sh
 
-ADD . .
-RUN go build -o wakapi
+# Build Stage
+FROM golang:1.16-alpine AS build-env
+
+# Required for go-sqlite3
+RUN apk add --no-cache gcc musl-dev
+
+WORKDIR /src
+COPY --from=prep-env /src .
+
+RUN go build -v -o wakapi
 
 WORKDIR /app
 RUN cp /src/wakapi . && \