[DoNotMerge]: Add dev image build workflow

Author: s3rj1k

.github/workflows/dev-image.yml

@@ -0,0 +1,48 @@
+name: Build Dev Image
+
+on:
+  push:
+    branches:
+    - 'multiarch'
+
+permissions:
+  contents: read
+  packages: write
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Generate timestamp
+      id: timestamp
+      run: echo "ts=$(date +%s)" >> $GITHUB_OUTPUT
+
+    - name: Build and push
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        platforms: linux/amd64
+        push: true
+        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.timestamp.outputs.ts }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max