File "/usr/local/lib/python3.6/dist-packages/cv2/__init__.py", line 8, in<module>
from .cv2 import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory
解决方案
RUN apt update
# Dependency for opencv-python (cv2). `import cv2` raises ImportError: libGL.so.1: c