replace gradio with fastapi+html, clean Dockerfile

fix: pin huggingface_hub==0.23.4 + gradio==4.19.2

fix: upgrade to gradio 4.44.1, remove broken theme

fix: pin mmcv>=2.0.0rc4,<2.2.0

fix: mmdet 3.x stack + DetDataSample API in app.py

switch to Docker sdk, pin python 3.10 + torch 1.13 + mmcv 1.7.1