Merge pull request #1995 from Honei/develop

[docker]add ubuntu cpu dockerfile

docker/ubuntu18-cpu/Dockerfile

+FROM registry.baidubce.com/paddlepaddle/paddle:2.2.2
+LABEL maintainer="paddlesl@baidu.com"
+
+RUN git clone --depth 1 https://github.com/PaddlePaddle/PaddleSpeech.git /home/PaddleSpeech  
+RUN pip3 uninstall mccabe -y ; exit 0;
+RUN pip3 install multiprocess==0.70.12 importlib-metadata==4.2.0 dill==0.3.4
+
+RUN cd /home/PaddleSpeech/audio
+RUN python setup.py bdist_wheel
+
+RUN cd /home/PaddleSpeech
+RUN python setup.py bdist_wheel
+RUN pip install audio/dist/*.whl dist/*.whl
+
+WORKDIR /home/PaddleSpeech/