add MPLBACKEND

Author: hephaex

python-ff/Dockerfile.20.06-py36-cuda10.1

@@ -15,7 +15,7 @@ ENV CUDNN_VERSION=7.6.4.38-1+cuda10.1
 ENV NCCL_VERSION=2.5.7-1+cuda10.1
 ENV DEBIAN_FRONTEND=noninteractive
 ENV mecab_dicdir /usr/local/lib/mecab/dic/mecab-ko-dic
-
+ENV MPLBACKEND=Svg
 ENV PYTHONUNBUFFERED=1 \
     LD_LIBRARY_PATH="/usr/local/cuda/extras/CUPTI/lib64:/usr/local/cuda/lib64:/usr/local/nvidia/lib64:/usr/include/x86_64-linux-gnu" \
     PATH="/usr/local/nvidia/bin:/usr/local/cuda/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/bin/mecab" \