fix: dockerfile

Dockerfile

@@ -2,5 +2,9 @@ FROM tensorflow/tensorflow:1.7.1-devel-py3
 RUN mkdir /facenet
 WORKDIR /facenet
 COPY . /facenet
-RUN pip install --upgrade pip -i https://pypi.tuna.tsinghua.edu.cn/simple/ \
-&& pip install -r requirements.txt  -i https://pypi.tuna.tsinghua.edu.cn/simple/ 
+RUN sed -i s@/archive.ubuntu.com/@/mirrors.aliyun.com/@g /etc/apt/sources.list \
+&& apt-get clean \
+&& apt-get update \
+&& apt-get install python3-tk \
+&& pip install --upgrade pip -i https://pypi.tuna.tsinghua.edu.cn/simple/ \
+&& pip install -r requirements.txt  -i https://pypi.tuna.tsinghua.edu.cn/simple/ \

requirements.txt

@@ -9,3 +9,5 @@ requests
 psutil
 Flask==1.1.4
 flask-api
+matplotlib
+python3-tk