add runpod envs to .bashrc, fix bnb env (#316)

* hopper support for base dockerfile, add runpod envs to .bashrc

* set BNB_CUDA_VERSION env for latest bnb

* don't support hopper yet w 118

docker/Dockerfile

@@ -3,6 +3,8 @@ FROM winglian/axolotl-base:$BASE_TAG
 
 ARG TORCH_CUDA_ARCH_LIST="7.0 7.5 8.0 8.6+PTX"
 ARG AXOLOTL_EXTRAS=""
+ARG CUDA="118"
+ENV BNB_CUDA_VERSION=$CUDA
 
 RUN apt-get update && \
     apt-get install -y vim curl