====== erstes Docker Image selbst bauen ======
===== Pakete =====
  * Rocky Linux (9):
    * erst ''epel-release'' installieren (fügt neues Repository hinzu)
    * debootstrap
  * Debian (ab 12): debootstrap

===== Image bauen =====
(( anders als das Image aus https://hub.docker.com/_/debian ist dieses Image nicht reproduzierbar ))
  sudo debootstrap --variant=minbase trixie ./debian http://debian/debian
  sudo tar cC debian/ . | docker image import - ingo/debian:trixie
Tag ''latest'' hinzufügen:
  docker image ls ingo/debian:trixie
-> id rauskopieren (z.B. ''dc9f1edde160'')
  docker image tag dc9f1edde160 ingo/debian:latest

==== testen ====
  docker container run ingo/debian echo hello world

====== Dockerfile - Docker Images weiterbauen ======
  mkdir static_web
  cd static_web
<file txt Dockerfile>
FROM ingo/debian:trixie
LABEL version="0.0.1"
LABEL maintainer="me@example.com"
ENV DEBIAN_FRONTEND noninteractive
ENV REFRESHED_AT 2026-01-07
RUN set -eux; \
  apt-get -qq update; \
  apt-get install -y --no-install-recommends nginx
RUN find / -xdev -user root -type f -perm /u+s -exec chmod u-s {} +
RUN echo 'A warm welcome from your Dockerfile' > /var/www/html/index.html
EXPOSE 80
ENTRYPOINT ["/usr/sbin/nginx", "-g", "daemon off;"]
</file>
  docker build -t='ingo/static_web:0.0.1' .
  docker image ls
  docker container run -d -p 80:80 --name my_static_web ingo/static_web
  curl -s http://localhost:80