feat: add cron to container

Dockerfile

@@ -3,13 +3,33 @@ FROM python:3.12-bookworm
 # Labels
 LABEL MAINTAINER="Jan-Ole Hübner <huebner@jan-ole.de>"
 
+# Install cron
+RUN apt-get update && apt-get install -y cron
+
+# Add the requirements
 ADD requirements.txt /
 RUN pip3 install -r /requirements.txt
 
 # Environment
 ENV PYTHONIOENCODING=utf-8
+
+# Add the application code
 ADD . /
 
-# Chmod
+# Add the cron job
+RUN echo "*/15 * * * * python3 /get_price.py >> /var/log/cron.log 2>&1" > /etc/cron.d/get_price
+
+# Give execution rights on the cron job
+RUN chmod 0644 /etc/cron.d/get_price
+
+# Apply the cron job
+RUN crontab /etc/cron.d/get_price
+
+# Create the log file to be able to run tail
+RUN touch /var/log/cron.log
+
+# Chmod for your main application script
 RUN chmod 755 /pulse.py
-CMD ["python3","/pulse.py"]
+
+# Run the command on container startup
+CMD cron && tail -f /var/log/cron.log