starting work on a docker build

README.md

@@ -249,7 +249,11 @@ Pre-commit hooks will automatically:
 - Lint with flake8
 - Fix trailing whitespace and other file issues
 
+## Docker
 
+```bash
+docker build -t pymc:latest . --platform linux/arm/v7
+```
 
 ## Support
 

docker-compose.yml

@@ -0,0 +1,16 @@
+services:
+  pymc-repeater:
+    build: .
+    container_name: pymc-repeater
+    restart: unless-stopped
+    devices:
+      - /dev/spidev0.0
+      - /dev/spidev0.1
+    volumes:
+      - ./config.yaml:/etc/pymc_repeater/config.yaml:ro
+      - pymc_data:/var/lib/pymc_repeater
+    ports:
+      - "8000:8000"
+
+volumes:
+  pymc_data:

dockerfile

@@ -0,0 +1,52 @@
+# ---------------------------
+# Builder stage
+# ---------------------------
+FROM python:3.11-alpine AS builder
+
+WORKDIR /build
+
+# Build dependencies
+RUN apk add --no-cache \
+    build-base \
+    linux-headers \
+    python3-dev
+
+COPY pyproject.toml .
+COPY repeater ./repeater
+
+# Build wheels (including spidev)
+RUN pip wheel --no-cache-dir --wheel-dir /wheels .
+
+# ---------------------------
+# Runtime stage
+# ---------------------------
+FROM python:3.11-alpine
+
+ENV PYTHONUNBUFFERED=1 \
+    CONFIG_PATH=/etc/pymc_repeater/config.yaml
+
+ARG UID=10001
+ARG GID=10001
+
+# Create non-root user
+RUN addgroup -g ${GID} repeater && \
+    adduser -D -u ${UID} -G repeater repeater
+
+WORKDIR /opt/pymc_repeater
+
+# Copy wheels from builder
+COPY --from=builder /wheels /wheels
+
+# Install from wheels only
+RUN pip install --no-cache-dir /wheels/* && \
+    rm -rf /wheels
+
+# Config directory
+RUN mkdir -p /etc/pymc_repeater && \
+    chown -R ${UID}:${GID} /etc/pymc_repeater
+
+USER ${UID}:${GID}
+
+EXPOSE 8000
+
+ENTRYPOINT ["/bin/sh", "-c", "test -f ${CONFIG_PATH} || (echo 'Missing config.yaml' && exit 1); exec python3 -m repeater --config ${CONFIG_PATH}"]