Update config used in detect.js

[teengineer]

Hello, i added my trained model's export file in this app but it threw an error, i think the reason is the config and i dont know the meaning of 'topk' in config, can you explain to me?

    "float32",
    new Float32Array([
      numClass, // num class
      topk, // topk per class
      iouThreshold, // iou threshold
      scoreThreshold, // score threshold
    ])
  ); // nms config tensor

This is the error message:

Uncaught (in promise) Error: input 'images' is missing in 'feeds'.
    run inference-session-impl.ts:95
    detectImage detect.js:48

the 48. line in detect.js is
const { selected } = await session.nms.run({ detection: output0, config: config }); // perform nms and filter boxes