anchor.diff:  
   # Debian Buster with Python 3.7.12
   FROM python:3.7.12-slim-buster
  +# bullseye seems to perform worse
  +#FROM python:3.7.12-slim-bullseye
   
   MAINTAINER William Ronchetti "william_ronchetti@hms.harvard.edu"
   
  
positive.code: #RUN node --version
  #RUN npm --version
  #RUN nginx --version
  
  WORKDIR /home/nginx/fourfront
  
  # Do the back-end dependency install
  
negative.code: ENV INI_BASE=${INI_BASE:-"fourfront_any_alpha.ini"}
  
  # Configure (global) Env
  # Note that some important versions are pinned in this statement
  ENV NGINX_USER=nginx \
      DEBIAN_FRONTEND=noninteractive \
      CRYPTOGRAPHY_DONT_BUILD_RUST=1 \
  