added docker build

.github/workflows/build-opencode-cli-docker.yml

@@ -0,0 +1,113 @@
+name: Build OpenCode CLI and Docker Image
+
+on:
+  push:
+    branches:
+      - main
+      - master
+    paths:
+      - opencode/**
+      - Dockerfile
+      - .github/workflows/build-opencode-cli-docker.yml
+  workflow_dispatch:
+    inputs:
+      image_name:
+        description: "Docker image name (including registry if desired)"
+        required: false
+        default: "ghcr.io/${{ github.repository_owner }}/shopify-ai-builder"
+      push_image:
+        description: "Push the image to the registry"
+        type: boolean
+        default: false
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-cli:
+    name: Build OpenCode CLI (${{ matrix.arch }})
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: amd64
+            runner: ubuntu-24.04
+            cli_dir: opencode-linux-x64
+          - arch: arm64
+            runner: ubuntu-24.04-arm64
+            cli_dir: opencode-linux-arm64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version-file: opencode/package.json
+
+      - name: Install dependencies
+        run: bun install
+        working-directory: opencode
+
+      - name: Build CLI
+        run: ./packages/opencode/script/build.ts --single
+        working-directory: opencode
+
+      - name: Upload CLI artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: opencode-cli-${{ matrix.arch }}
+          path: opencode/packages/opencode/dist/${{ matrix.cli_dir }}
+
+  build-image:
+    name: Build Docker image
+    needs: build-cli
+    runs-on: ubuntu-24.04
+    env:
+      IMAGE_NAME: ${{ inputs.image_name || format('ghcr.io/{0}/shopify-ai-builder', github.repository_owner) }}
+      PUSH_IMAGE: ${{ inputs.push_image || false }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Download CLI artifacts
+        uses: actions/download-artifact@v4
+        with:
+          pattern: opencode-cli-*
+          path: opencode/packages/opencode/dist
+          merge-multiple: true
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GHCR
+        if: ${{ env.PUSH_IMAGE == 'true' }}
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build image (multi-arch push)
+        if: ${{ env.PUSH_IMAGE == 'true' }}
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            -t "$IMAGE_NAME" \
+            --push \
+            .
+
+      - name: Build image (amd64) and verify CLI
+        if: ${{ env.PUSH_IMAGE != 'true' }}
+        run: |
+          docker buildx build \
+            --platform linux/amd64 \
+            -t "$IMAGE_NAME" \
+            --load \
+            .
+          docker run --rm "$IMAGE_NAME" opencode --version