From the FAQ:
At this stage of development is too early to say, still lots of optimizations are needed, and lots of features are going to be added.
The game already provides a full range of typical quality configurations though.We will know actual minimum requirements near the final release
Integrated GPU are not going to be officially supported.
Edit: The official requirements as for the first closed beta (work in progress) release (July 2020):
REQUIREMENTS
Recommended requirements for “Normal settings”: i7 8GB 1060 GTX
Minimum requirements for “Low settings”: i5 8GB with a 2GB GPU
Currently integrated Intel GPUs are not officially supported.
This is a work in progress version so bugs and optimization problems with some hardware & drivers are expected.