Add Dockerfile for multi-arch builds

Author: max-lt

.github/workflows/docker.yml

@@ -0,0 +1,51 @@
+name: Docker
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*.*.*"
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v4
+
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=ref,event=branch
+            type=ref,event=tag
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build CLI
+        id: docker_build
+        uses: docker/build-push-action@v5
+        with:
+          file: Dockerfile.multi
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/amd64,linux/arm64