Docker GPU pip install opencv-python<4.6.0.66

[glenn-jocher]

Resolves AttributeError: partially initialized module 'cv2' has no attribute '_registerMatType' (most likely due to a circular import) with cv2 4.6.0.66

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improvement of the YOLOv5 Docker image by specifying OpenCV version.

📊 Key Changes

• Added explicit OpenCV Python version requirement in the Dockerfile.

🎯 Purpose & Impact

• 🚀 Ensures compatibility: By fixing the OpenCV version, potential compatibility issues with future releases are pre-empted.
• 🔧 More stable builds: This can help in maintaining more stable builds for YOLOv5 Docker images.
• 💡 User confidence: Users can be confident that the Docker image will work out-of-the-box without version conflicts.