ci: add support for target OS and architecture in build configuration

Author: kimdre

.github/workflows/build-dev.yaml

@@ -20,6 +20,10 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ linux ]
+        arch: [ amd64 ]
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -59,10 +63,13 @@ jobs:
           provenance: false
           build-args: |
             APP_VERSION=dev-build.${{ steps.vars.outputs.short_sha }}
+            TARGET_OS=${{ matrix.os }}
+            TARGET_ARCH=${{ matrix.arch }}
           push: false
           load: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: ${{ matrix.os }}/${{ matrix.arch }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
@@ -86,8 +93,11 @@ jobs:
           provenance: false
           build-args: |
             APP_VERSION=dev-build.${{ steps.vars.outputs.short_sha }}
+            TARGET_OS=${{ matrix.os }}
+            TARGET_ARCH=${{ matrix.arch }}
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: ${{ matrix.os }}/${{ matrix.arch }}
           cache-from: type=gha
           cache-to: type=gha,mode=max

.github/workflows/build.yaml

@@ -15,6 +15,13 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - linux
+        arch:
+          - amd64
+          - arm64
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -50,11 +57,11 @@ jobs:
           provenance: false
           build-args: |
             APP_VERSION=${{ github.ref_name }}
+            TARGET_OS=${{ matrix.os }}
+            TARGET_ARCH=${{ matrix.arch }}
           push: ${{ startsWith(github.ref, 'refs/tags/') }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: |
-            linux/amd64
-            linux/arm64
+          platforms: ${{ matrix.os }}/${{ matrix.arch }}
           cache-from: type=gha
           cache-to: type=gha,mode=max

Dockerfile

@@ -2,6 +2,8 @@
 FROM golang:1.24.5@sha256:14fd8a55e59a560704e5fc44970b301d00d344e45d6b914dda228e09f359a088 AS build-stage
 
 ARG APP_VERSION=dev
+ARG TARGET_OS=linux
+ARG TARGET_ARCH=amd64
 
 # Set destination for COPY
 WORKDIR /app
@@ -20,7 +22,8 @@ COPY . ./
 # Set build environment
 ENV GOCACHE=/root/.cache/go-build \
     CGO_ENABLED=0 \
-    GOOS=linux
+    GOOS=${TARGET_OS} \
+    GOARCH=${TARGET_ARCH}
 
 # Build and strip binary
 RUN --mount=type=cache,target=/go/pkg/mod/ \