3 RUN apt-get update && apt-get install -y --no-install-recommends \
 
   5       libxml-treebuilder-perl \
 
  13 RUN curl -fsSL https://github.com/StackExchange/dnscontrol/releases/download/v3.9.0/dnscontrol-Linux -o /usr/local/bin/dnscontrol \
 
  14     && chmod +x /usr/local/bin/dnscontrol \
 
  15     && /usr/local/bin/dnscontrol version