From 4bbe3ef70dd0dbc01becd3e97400a839657bc9f6 Mon Sep 17 00:00:00 2001
From: David Mays <david.mays@digital.cabinet-office.gov.uk>
Date: Mon, 29 Apr 2024 11:56:17 +0100
Subject: [PATCH] Enable multi-arch for gov-frontend

---
 .github/workflows/deploy.yml | 2 +-
 Dockerfile                   | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 8322900f1..5712d966b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -25,7 +25,7 @@ jobs:
   build-and-publish-image:
     if: github.event_name == 'workflow_dispatch' || startsWith(github.event.release.tag_name, 'v')
     name: Build and publish image
-    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-image.yml@main
+    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-multiarch-image.yml@main
     with:
       gitRef: ${{ inputs.gitRef || github.event.release.tag_name }}
     permissions:
diff --git a/Dockerfile b/Dockerfile
index d8020c331..4fd18b9f5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG base_image=ghcr.io/alphagov/govuk-ruby-base:$ruby_version
 ARG builder_image=ghcr.io/alphagov/govuk-ruby-builder:$ruby_version
 
 
-FROM $builder_image AS builder
+FROM --platform=$TARGETPLATFORM $builder_image AS builder
 
 WORKDIR $APP_HOME
 COPY Gemfile* .ruby-version ./
@@ -15,7 +15,7 @@ RUN bootsnap precompile --gemfile .
 RUN rails assets:precompile && rm -fr log
 
 
-FROM $base_image
+FROM --platform=$TARGETPLATFORM $base_image
 
 ENV GOVUK_APP_NAME=government-frontend