Dockerfile: updating to use latest pytorch and apex

Dockerfile

@@ -1,2 +1,10 @@
-FROM pytorch/pytorch:0.4_cuda9_cudnn7
+FROM pytorch/pytorch:nightly-devel-cuda10.0-cudnn7
+ENV PATH /usr/local/nvidia/bin:/usr/local/cuda/bin:${PATH}
+
+RUN apt-get update -y
+
 RUN pip install numpy scipy matplotlib librosa==0.6.0 tensorflow tensorboardX inflect==0.2.5 Unidecode==1.0.22 jupyter
+
+ADD apex /apex/
+WORKDIR /apex/
+RUN pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" .