The docker image opencv version does not have GTK active

[KansaiUser]

I was hoping to use your docker image to try some opencv but it does not work.

Turns out the container you created do not have the GTK active so any opencv program fails with

OpenCV(3.4.1) Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvShowImage, file /opencv-3.4.1/modules/highgui/src/window.cpp, line 636
terminate called after throwing an instance of 'cv::Exception'
  what():  OpenCV(3.4.1) /opencv-3.4.1/modules/highgui/src/window.cpp:636: error: (-2) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function cvShowImage

I would try to correct this but my machine for some reason can not build docker images anymore. Can you correct the opencv in your docker image?