RUN apt-get update RUN apt-get install -y build-essential ~~some_packeges~~ vim ← vimを追加した E: Failed to fetch http://deb.debian.org/debian-security/pool/updates/main/libk/libksba/libksba8_1.3.5-2+deb10u1_amd64.deb 404 Not Found [IP: 151.101.110.132 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? 以下から探してみると確かに存在しない http://security.debian.org/debian-security