nebulabroadcast/nebula ? reverse-engineered prompt

Build me a web based media asset management and broadcast automation app for TV, radio, and VOD.

I want a system where editors can upload and search media, edit metadata, preview clips, make sub clips, and manage assets in a simple catalog. It should also handle video and audio processing, including analysis, transcoding, normalization, proxy creation, and automatic conversions when needed. On the broadcast side, I want a scheduler where people can build playlists and rundowns with drag and drop, add live events, and have unfinished items pair up automatically when the media is ready. It should also support playout control for a broadcast server like CasparCG, with room for secondary events like graphics or router control.

Make it as a Python backend with a React web frontend, and include a Docker setup so it can run easily. If anything about the current ecosystem or best practices matters, look up the latest docs online first.