Update instruction to install jax on GPU (#1470)

Author: fehiepsi

README.md

@@ -238,7 +238,7 @@ pip install numpyro[cpu]
 
 To use **NumPyro on the GPU**, you need to install CUDA first and then use the following pip command:
 ```
-pip install numpyro[cuda] -f https://storage.googleapis.com/jax-releases/jax_releases.html
+pip install numpyro[cuda] -f https://storage.googleapis.com/jax-releases/jax_cuda_releases.html
 ```
 If you need further guidance, please have a look at the [JAX GPU installation instructions](https://github.com/google/jax#pip-installation-gpu-cuda).
 

docker/dev/Dockerfile

@@ -8,9 +8,7 @@ FROM nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04
 
 # declare the image name
 # note that this image uses Python 3.8
-ENV IMG_NAME=11.2.2-cudnn8-devel-ubuntu20.04 \
-    # declare the cuda version for pulling appropriate jaxlib wheel
-    JAXLIB_CUDA=111
+ENV IMG_NAME=11.2.2-cudnn8-devel-ubuntu20.04
 
 # install python3 and pip on top of the base Ubuntu image
 # unlike for release, we need to install git and setuptools too
@@ -22,11 +20,7 @@ RUN apt update && \
 ENV PATH=/root/.local/bin:$PATH
 
 # install python packages via pip
-# install pip-versions to detect the latest version of jax and jaxlib
-RUN pip3 install pip-versions
-# this uses latest version of jax and jaxlib available from pypi
-RUN pip-versions latest jaxlib | xargs -I{} pip3 install jaxlib=={}+cuda${JAXLIB_CUDA} -f https://storage.googleapis.com/jax-releases/jax_releases.html \
-    jax
+RUN pip3 install jax[cuda] -f https://storage.googleapis.com/jax-releases/jax_cuda_releases.html
 
 # clone the numpyro git repository and run pip install
 RUN git clone https://github.com/pyro-ppl/numpyro.git && \