anchor.diff:  ENV TOR_USER=tord \
       TOR_NICKNAME=Tor4
   
  -
   # Install prerequisites
   RUN apk --no-cache add --update \
  -    go \
  -    git \
  -    gnupg \
  -    build-base \
  -    libgmpxx \
  -    gmp-dev \
  -    libevent \
  -    libevent-dev \
  -    openssl \
  -    openssl-dev \
  -    xz-libs \
  -    xz-dev \
  -    zstd \
  -    zstd-dev \
  -    pwgen \
  +      gnupg \
  +      build-base \
  +      libgmpxx \
  +      gmp-dev \
  +      libevent \
  +      libevent-dev \
  +      openssl \
  +      openssl-dev \
  +      xz-libs \
  +      xz-dev \
  +      zstd \
  +      zstd-dev \
  +      pwgen \
       # Install Tor from source, incl. GeoIP files (get latest release version number from Tor ReleaseNotes)
       && TOR_VERSION=$(wget -q https://gitweb.torproject.org/tor.git/plain/ReleaseNotes -O - | grep -m1  "Changes in version" | sed 's/^.*[^0-9]\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\).*$/\1/') \
       && TOR_TARBALL_NAME="tor-${TOR_VERSION}.tar.gz" \
  
positive.code:       openssl-dev \
        xz-dev \
        zstd-dev
  
  # Create an unprivileged tor user
  RUN addgroup -g 19001 -S $TOR_USER && adduser -u 19001 -G $TOR_USER -S $TOR_USER
  
negative.code:     && rm -r tor-$TOR_VERSION \
      && rm $TOR_TARBALL_NAME \
      && rm $TOR_TARBALL_NAME.asc \
      && apk del \
        gnupg \
        build-base \
        gmp-dev \
  