- Install python-dotenv in virtual environment during CyberPanel setup
- Fixes Django's inability to load .env file on AlmaLinux 8
- Resolves "Access denied for user 'cyberpanel'@'localhost'" errors
- Added to all installation paths (normal, DEV, and after_install)
This ensures Django can properly load database credentials from .env file
on AlmaLinux 8 systems where python-dotenv was missing.
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