update Docker image

Author: krausest

Dockerfile

@@ -1,15 +1,16 @@
 
-FROM ubuntu:20.10
+FROM ubuntu:21.10
 COPY install_rust.sh /root/
 RUN echo "unsafe-perm = true" > /root/.npmrc
 RUN echo "NG_CLI_ANALYTICS=ci" >> /root/.npmrc
 RUN echo "{ \"allow_root\": true }" >  /root/.bowerrc
 
 # replace shell with bash so we can source files
 RUN rm /bin/sh && ln -s /bin/bash /bin/sh
+RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
 
 RUN apt-get update
-RUN apt-get install -y m4 libtinfo5 libghc-zlib-dev rsync ghc haskell-stack curl g++ make git openjdk-8-jdk dos2unix python
+RUN apt-get install -y python3 m4 libtinfo5 libghc-zlib-dev rsync ghc haskell-stack curl g++ make git openjdk-8-jdk dos2unix python
 
 ENV NVM_DIR /usr/local/nvm
 RUN mkdir -p $NVM_DIR