Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -8,6 +8,16 @@ As a singular college student working on this crate for fun to better understand
 
 ### Running code locally
 
+To begin, please follow the same instructions listed in the README to ensure XLA is properly installed and sourced on your machine.
+
+1) Identify the [latest compatible versions of CUDA and cuDNN](https://www.tensorflow.org/install/source#gpu). Adapt [these instructions](https://medium.com/@gokul.a.krishnan/how-to-install-cuda-cudnn-and-tensorflow-on-ubuntu-22-04-2023-20fdfdb96907) to install the two version of CUDA and cuDNN together.
+
+2) Install `clang` and `libclang1`.
+
+3) Download and extract [xla_extension](https://github.com/elixir-nx/xla/releases/tag/v0.6.0).
+
+4) Make sure `LD_LIBRARY_PATH` includes `/path/to/xla_extension/lib`, and make sure the relevant CUDA paths are also visible to the system.
+
 Assuming you downloaded unda to `/home/user/unda` and you want to run
 the crate locally, it's relatively self explanatory as you would run any rust project:
 ```bash