FROM python:3.13-slim-bookworm

# PlatformIO + host-tool build deps
RUN apt-get update \
 && apt-get install -y --no-install-recommends \
    git \
    bash \
    ca-certificates \
    build-essential \
 && rm -rf /var/lib/apt/lists/*

# PlatformIO + workflow deps
RUN pip install --no-cache-dir platformio requests esptool intelhex

WORKDIR /work

# Keep PlatformIO home on a volume by default
ENV PLATFORMIO_CORE_DIR=/root/.platformio