build: publish metis images per architecture

Dockerfile

@@ -1,9 +1,14 @@
 # syntax=docker/dockerfile:1.7
 
-FROM golang:1.22-bookworm AS build
+ARG BUILDPLATFORM=linux/amd64
+ARG TARGETPLATFORM
+ARG TARGETOS
+ARG TARGETARCH
 
-ARG TARGETOS=linux
+FROM --platform=$BUILDPLATFORM golang:1.22-bookworm AS build
-ARG TARGETARCH=arm64
+
+ARG TARGETOS
+ARG TARGETARCH
 
 WORKDIR /src
 COPY go.mod go.sum ./

Jenkinsfile

@@ -194,26 +194,32 @@ PY
       }
     }
 
-    stage('Build & push image') {
+    stage('Build & push images') {
       steps {
         container('builder') {
           sh '''
             set -euo pipefail
             VERSION_TAG="$(cut -d= -f2 build.env)"
-            docker buildx build \
+            for arch in amd64 arm64; do
-              --platform linux/amd64,linux/arm64 \
+              docker buildx build \
-              --tag "${IMAGE}:${VERSION_TAG}" \
+                --platform "linux/${arch}" \
-              --tag "${IMAGE}:latest" \
+                --build-arg TARGETOS=linux \
-              --target runtime \
+                --build-arg TARGETARCH="${arch}" \
-              --push \
+                --tag "${IMAGE}:${VERSION_TAG}-${arch}" \
-              .
+                --tag "${IMAGE}:latest-${arch}" \
-            docker buildx build \
+                --target runtime \
-              --platform linux/amd64,linux/arm64 \
+                --push \
-              --tag "${SENTINEL_IMAGE}:${VERSION_TAG}" \
+                .
-              --tag "${SENTINEL_IMAGE}:latest" \
+              docker buildx build \
-              --target sentinel \
+                --platform "linux/${arch}" \
-              --push \
+                --build-arg TARGETOS=linux \
-              .
+                --build-arg TARGETARCH="${arch}" \
+                --tag "${SENTINEL_IMAGE}:${VERSION_TAG}-${arch}" \
+                --tag "${SENTINEL_IMAGE}:latest-${arch}" \
+                --target sentinel \
+                --push \
+                .
+            done
           '''
         }
       }