Missing Deepstream header file in base docker image

Hi. I’m using Docker image with tag base of Deepstream (nvcr.io/nvidia/deepstream:5.0.1-20.09-base) from NGC for building my own image, but when I run a container from this image, inside the container I can not see any include files of the Deepstream libs, such as gstnvdsinfer.h . I can not find any file in /usr/include/ or /usr/local/include/. How can I use it to build my own C++ source code?