Dockerfile

FROM ubuntu:latest

RUN eval "$VAR1 $VAR2 $VAR4" && \
    eval "$VAR1 $VAR3 $VAR4 $VAR5 $VAR6 $VAR7 $VAR8 $VAR9 $VAR10"

RUN $VAR11 $VAR3 $VAR12

CMD /bin/bash -c "$VAR20"