added venv to script

Dockerfile.cron

@@ -0,0 +1,23 @@
+FROM --platform=$TARGETPLATFORM python:3.12-slim-bookworm
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+WORKDIR /app
+
+# Install Python dependencies first to leverage layer caching.
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application source.
+COPY jira_jotty_sync.py ./
+COPY sync_config.json.template ./
+
+# Run as non-root for better container security.
+RUN useradd --create-home --uid 10001 appuser && chown -R appuser:appuser /app
+USER appuser
+
+# Run every 5 minutes via cron
+CMD echo "*/5 * * * * cd /app && python jira_jotty_sync.py --direction both >> /tmp/sync.log 2>&1" | crontab - && \
+    crond -f