1FROM gcc:latest 2WORKDIR /usr/src/unbound 3# install semantic parser & lexical analyzer 4# install packages used in tests 5RUN apt-get update && apt-get install -y bison flex ldnsutils dnsutils xxd splint doxygen netcat-openbsd 6# accept short rsa keys, which are used in tests 7RUN sed -i 's/SECLEVEL=2/SECLEVEL=1/g' /usr/lib/ssl/openssl.cnf 8 9CMD ["/bin/bash"] 10