anchor.diff:          python3-pip
   
   # Install Node.js and npm. 
  -RUN curl -sL https://deb.nodesource.com/setup_12.x | bash - \
  +RUN curl -sL https://deb.nodesource.com/setup_14.x | bash - \
    && apt-get update \
    && apt-get install -y \
           nodejs \
  
positive.code: 
  # Create non-root `worker` user and use it's home dir
  # to copy files into
  RUN useradd -m worker
  WORKDIR /home/worker
  
  # Install Python dependencies
  
negative.code: FROM ubuntu:20.04
  
  ARG DEBIAN_FRONTEND=noninteractive
  ARG APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1
  
  # Install system dependencies
  RUN apt-get update \
  