Dockerfile

# Lisboa Environmental Sensor Collector - Docker Image
# Runs on TrueNAS Scale (Debian-based) and any Docker-compatible platform

FROM python:3.13-slim

# Metadata
LABEL maintainer="Paulo"
LABEL description="Collects hourly environmental sensor data from Lisboa Aberta API"
LABEL version="1.0"

# Set working directory
WORKDIR /app

# Install system dependencies (certificates for SSL, tzdata for timezone, cron for scheduling)
RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    tzdata \
    cron \
    && rm -rf /var/lib/apt/lists/*

# Set timezone to UTC (API returns UTC timestamps)
ENV TZ=UTC

# Copy requirements first (for better layer caching)
COPY requirements-dev.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements-dev.txt

# Copy application code
COPY src/ ./src/
COPY sensors.json .

# Copy entrypoint script
COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
RUN chmod +x /usr/local/bin/docker-entrypoint.sh

# Create data directory for CSV output
RUN mkdir -p /app/data

# Create non-root user for security
RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
USER appuser

# Default command - runs once and exits (intended for cron/ScheduledTask)
# For hourly runs, set CRON_SCHEDULE="0 * * * *" environment variable
ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
CMD ["--config", "sensors.json", "--out-dir", "data"]