Update Dockerfile for Umbrel + add multi-arch CI build

Dockerfile changes:
- Use COPY instead of git clone (build from local source)
- Add entrypoint.sh for auto-configuration from env vars
- EXPOSE 6969 and configurable via PYBLOCK_PORT env var
- Create config directory as volume mount point
- ENTRYPOINT replaces CMD for pre-launch setup

New .github/workflows/docker-build.yml:
- Multi-arch build: linux/amd64 + linux/arm64 (Raspberry Pi)
- Triggers on version tags (v*.*.*)
- Pushes to Docker Hub as curly60e/pyblock:version and :latest
- Uses QEMU + Buildx for cross-compilation
- GitHub Actions cache for faster builds

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/docker-build.yml

@@ -0,0 +1,44 @@
+name: Build Multi-Arch Docker Image
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU for multi-arch
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract version from tag
+        id: version
+        run: echo "VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
+
+      - name: Build and push multi-arch image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            curly60e/pyblock:${{ steps.version.outputs.VERSION }}
+            curly60e/pyblock:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

dockerfile

@@ -1,8 +1,9 @@
-FROM ubuntu:24.04@sha256:b59d21599a2b151e7f6a8d7b6f0e864fbb4ce8b0c9cf09be2e67f4d6e3b942a4
+FROM ubuntu:24.04
 
 WORKDIR /app
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
+ENV PYBLOCK_PORT=6969
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
@@ -25,17 +26,28 @@ RUN git clone --branch 1.7.7 --depth 1 https://github.com/tsl0922/ttyd.git \
 RUN python3 -m venv /app/venv
 ENV PATH="/app/venv/bin:$PATH"
 
+# Copy project files
+COPY requirements.txt /app/pyblock/requirements.txt
 RUN pip install --no-cache-dir --upgrade pip \
-    && git clone --depth 1 https://github.com/curly60e/pyblock.git \
-    && cd pyblock \
-    && pip install --no-cache-dir -r requirements.txt
+    && pip install --no-cache-dir -r /app/pyblock/requirements.txt
+
+COPY . /app/pyblock/
+
+# Entrypoint for auto-configuration
+COPY entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
+
+# Create config volume mount point
+RUN mkdir -p /app/pyblock/pybitblock/config
 
 RUN useradd -m -s /bin/bash pyblock \
     && chown -R pyblock:pyblock /app
 
 USER pyblock
 
-HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
-    CMD curl -f http://localhost:6969/ || exit 1
+EXPOSE 6969
 
-CMD ["ttyd", "-W", "-p", "6969", "-c", "Running:PyBLOCK", "python3", "pyblock/pybitblock/PyBlock.py"]
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD curl -f http://localhost:${PYBLOCK_PORT:-6969}/ || exit 1
+
+ENTRYPOINT ["/app/entrypoint.sh"]