message: Update Dockerfile devel
diff: @@ -77,6 +77,13 @@ RUN wget -q https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz && \
  CFLAGS="-Wformat" ./configure --prefix=/usr/local/ --enable-shared > /dev/null && \
  make -j8 > /dev/null && make altinstall > /dev/null && ldconfig && cd .. && rm -rf Python-3.8.0*
  +# Install Python3.9
  +RUN wget -q https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz && \
  + tar -xzf Python-3.9.0.tgz && cd Python-3.9.0 && \
  + CFLAGS="-Wformat" ./configure --prefix=/usr/local/ --enable-shared > /dev/null && \
  + make -j8 > /dev/null && make altinstall > /dev/null && ldconfig && cd .. && rm -rf Python-3.9.0*
  +
  +
  ENV LD_LIBRARY_PATH=/usr/local/lib:${LD_LIBRARY_PATH}
  RUN ln -sf /usr/local/bin/python3.6 /usr/local/bin/python3 && ln -sf /usr/local/bin/python3.6 /usr/bin/python3 && ln -sf /usr/local/bin/pip3.6 /usr/local/bin/pip3 && ln -sf /usr/local/bin/pip3.6 /usr/bin/pip3
  @@ -132,10 +139,13 @@ RUN wget https://paddle-ci.gz.bcebos.com/ccache-3.7.9.tar.gz && \
  make -j8 && make install && \
  ln -s /usr/local/ccache-3.7.9/bin/ccache /usr/local/bin/ccache
  -RUN python3.8 -m pip install --upgrade pip==21.1.1 requests && \
  - python3.7 -m pip install --upgrade pip==21.1.1 requests && \
  - python3.6 -m pip install --upgrade pip==21.1.1 requests
  +# Update pip version
  +RUN python3.8 -m pip install --upgrade pip==21.3.1 requests && \
  + python3.7 -m pip install --upgrade pip==21.3.1 requests && \
  + python3.6 -m pip install --upgrade pip==21.3.1 requests && \
  + python3.9 -m pip install --upgrade pip==21.3.1 requests
  +# Wget ssl libs and link thems
  RUN wget https://paddle-serving.bj.bcebos.com/others/centos_ssl.tar && \
  tar xf centos_ssl.tar && rm -rf centos_ssl.tar && \
  mv libcrypto.so.1.0.2k /usr/lib/libcrypto.so.1.0.2k && mv libssl.so.1.0.2k /usr/lib/libssl.so.1.0.2k && \
  