Update Jupyterhub.Dockerfile

Jupyterhub.Dockerfile

@@ -13,7 +13,7 @@ RUN echo "${USERNAME}:${USERPASSWORD}" | chpasswd
 
 # Install python2 and pip2 since PyROOT relies on it
 RUN curl -sL https://deb.nodesource.com/setup_12.x | bash - && \
-    apt-get -y install python python-dev python-pip python3 python3-dev python3-pip nodejs npm curl python3-pycurl  && \
+    apt-get -y install python python-dev python-pip python3 python3-dev python3-pip nodejs curl python3-pycurl  && \
     npm install -g configurable-http-proxy@^4.2.0 && rm -rf ~/.npm && \
     python2 -m pip install metakernel && python2 -m pip install ipykernel && python2 -m ipykernel install && \
     python3 -m pip install metakernel && python3 -m pip install ipykernel && python3 -m ipykernel install && \