feat: add Github Action to build ComfyUI dev container

.github/workflows/comfyui-dev-container.yml

@@ -0,0 +1,38 @@
+name: Build and Push ComfyUI Dev Container
+
+on:
+  push:
+    paths:
+      - ".github/workflows/comfyui-dev-container.yml"
+      - "ComfyUI/Dockerfile.local-cpu"
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: ComfyUI
+          file: Dockerfile.local-cpu
+          push: true
+          provenance: true
+          platforms: linux/amd64,linux/arm64
+          tags: ghcr.io/${{ github.repository }}/comfyui-composer:latest