FROM ubuntu:20.04 ENV DEBIAN_FRONTEND=noninteractive RUN apt-get update && apt-get install -y tzdata && apt-get clean ENV TZ=Asia/Tokyo RUN apt-get update && \ apt-get install -y clang \ cmake \ doxygen \ git \ graphviz \ libboost-dev \ libcurl4-openssl-dev \ libssl-dev \ ninja-build \ pkg-config && \ apt-get clean