anchor.diff:  # BUILD STAGE
  -FROM debian:stretch as build-stage
  +FROM debian:bullseye as build-stage
   
   ENV BUILD_DIR /tmp/build
   ENV NVM_DIR /root/.nvm
  
positive.code:   apt-utils \
    build-essential \
    ca-certificates \
    python-pip \
    curl \
    git \
    udev
  
negative.code: ENV PATH $NVM_DIR/versions/node/$NODE_VERSION/bin:$PATH
  
  RUN apt-get update -y && apt-get install -y -q --no-install-recommends \
    apt-utils \
    ca-certificates \
    udev
  
  