Change Docker entrypoint to owlbot.py

Dockerfile

@@ -5,9 +5,8 @@ WORKDIR /owlbot
 
 RUN apk add --no-cache python3 py3-pip
 RUN pip install --break-system-packages -r requirements.txt
-RUN crontab crontab.txt
 
 # Install tzdata to switch timezone on deployment
 RUN apk add --no-cache tzdata
 
-CMD ["crond", "-f"]
+CMD ["python", "owlbot.py"]