Build and publish our docker image automatically

Author: Pwootage

.github/workflows/docker-publish.yml

@@ -0,0 +1,53 @@
+name: Build and Publish Image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'build_image/**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+env:
+  PACKAGE_REGISTRY: ghcr.io
+  IMAGE_NAME: ghcr.io/${{ github.repository_owner }}/prime-practice-native/build
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v5
+
+#      - name: Set up QEMU
+#        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Set build date tag
+        id: date
+        run: |
+          echo "build_date=$(date -u +%Y%m%d)" >> "$GITHUB_OUTPUT"
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.PACKAGE_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: build_image
+          file: build_image/Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            ${{ env.IMAGE_NAME }}:latest
+            ${{ env.IMAGE_NAME }}:${{ steps.date.outputs.build_date }}

build_image/Dockerfile

@@ -1,4 +1,4 @@
-FROM devkitpro/devkitppc:20251117
+FROM --platform=$BUILDPLATFORM devkitpro/devkitppc:20251117 as builder
 LABEL authors="pwootage"
 
 # Need to install llvm, as practice mod also requires it