Fix #263: Implement log rotation for server/error logs in docker-zulip

[savaliyabhargav]

This PR implements proper log rotation for server and error logs in docker-zulip.

Changes made:

• Added logrotate configuration
• Updated supervisor configuration
• Modified entrypoint.sh to handle log rotation setup
• Updated docker-compose.yml with proper volume mounts

Testing:

• Logs are now properly rotated daily
• Maximum file size is enforced
• Old logs are compressed and maintained for 7 days
• Supervisor properly reopens log files after rotation

Fixes #263

[savaliyabhargav]

@timabbott Sir, I would like to make another attempt at resolving this issue. Kindly assign it to me once again. Additionally, I seek your guidance in solving the problem and improving my solution. Please provide suggestions on how I can refine my approach. I am confident that I can resolve this issue successfully.