HumanSignal/label-studio ? reverse-engineered prompt

Build me an open source web app for labeling data for machine learning, similar to Label Studio. I want a clean UI where a user can create a project, upload or connect data, then label different kinds of content like images, text, audio, video, and time series.

It should support common annotation jobs like image classification, bounding boxes, segmentation, text tagging, and audio transcription. Users should be able to customize the labeling screen for their dataset, review completed work, and export the results in useful formats for training models.

Please make it easy to run locally, preferably with Docker, and include a simple setup that uses a real database for a more production ready option. If it needs a backend and frontend, build both and make sure the basic flow works end to end. Look up current docs online if you need to.