production docker deployment update

docker/Dockerfile.api

@@ -0,0 +1,32 @@
+# Backend — Django + Gunicorn (+ cron in sibling container)
+FROM python:3.12-slim-bookworm
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    libjpeg62-turbo-dev \
+    zlib1g-dev \
+    libpq-dev \
+    cron \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY backend/requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY backend/ .
+COPY docker/entrypoint-api.sh docker/entrypoint-cron.sh docker/karung_sync_loop.sh /app/
+COPY docker/crontab /etc/cron.d/executive
+
+RUN chmod +x /app/entrypoint-api.sh /app/entrypoint-cron.sh /app/karung_sync_loop.sh \
+    && mkdir -p /app/data /app/media /app/staticfiles \
+    && chmod 0644 /etc/cron.d/executive \
+    && crontab /etc/cron.d/executive
+
+EXPOSE 8000
+
+ENTRYPOINT ["/app/entrypoint-api.sh"]