Upgrade pip and use headless opencv in Dockerfile (#132)
Upgrade pip and use headless opencv in Dockerfile (#132)

* Upgrade pip in Dockerfile

* Install headless opencv to fix libgl error
intel-isl/MiDaS,intel-isl/MiDaS,intel-isl/MiDaS,intel-isl/MiDaS,intel-isl/MiDaS,intel-isl/MiDaS