我如何在Docker容器中仅设置python 2.7？

我有节点应用程序，在一个用例中，我从节点使用调用python脚本python-shell。我正在尝试在Docker上设置此应用，而我的Dockerfile看起来像这样

FROM debian:latest
# replace shell with bash so we can source files
RUN rm /bin/sh && ln -s /bin/bash /bin/sh
# update the repository sources list
# and install dependencies
RUN apt-get update \
&& apt-get install -y curl \
&& apt-get -y autoclean
# nvm environment variables
ENV NVM_DIR /usr/local/nvm
ENV NODE_VERSION 10.15.3
# install nvm
# https://github.com/creationix/nvm#install-script
RUN curl --silent -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.2/install.sh | bash
# install node and npm
RUN source $NVM_DIR/nvm.sh \
&& nvm install $NODE_VERSION \
&& nvm alias default $NODE_VERSION \
&& nvm use default
# add node and npm to path so the commands are available
ENV NODE_PATH $NVM_DIR/v$NODE_VERSION/lib/node_modules
ENV PATH $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH
# confirm installation
RUN node -v
RUN npm -v
RUN apt-get -y install python2.7
COPY package.json .
RUN npm install
COPY . .
CMD ["npm","run","start"]

在构建并运行此容器后，当我尝试调用从节点调用python脚本的用例时，出现此错误。

null
events.js:174
      throw er; // Unhandled 'error' event
      ^

Error: spawn /usr/lib/python2.7 EACCES
    at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1