It emulates a dumb framebuffer using virtual memory. Xvfb is an X server that can run on machines with no display hardware and no physical input devices. This is where Xvfb ( X Virtual FrameBuffer) comes in very helpful. Our first major challenge is the lack of display. A means to access the container’s display.Before we build the Docker image, let’s consider what we will need to run a graphical application: To actually do something, we will need to execute some logic whenever a new container is created from the image. By default, a Docker container does nothing when it is started.
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