Added entrypoint script to handle database permissions on fresh deployments.
The issue occurred because Docker creates the ./data directory with root permissions
when it doesn't exist, preventing the nextjs user (uid 1001) from writing to it.
Changes:
- Add entrypoint.sh that runs as root, fixes permissions, then switches to nextjs user
- Install gosu for safe privilege dropping
- Initialize database on first run with proper permissions
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
