Example of how to pipe output into a container

pipe-to-container.md

# This is how piping a file into a container could be done for a build.
# The container’s ID will be printed after the build is done and the build logs
# could be retrieved using docker logs. This is useful if you need to pipe a
# file or something else into a container and retrieve the container’s ID once
# the container has finished running.
#
# See https://docs.docker.com/engine/reference/commandline/run/#attach-to-stdinstdoutstderr--a

$ date | docker run -i -a stdin debian:buster sh -c 'printf "%s\\n" "Hello world $@" && cat -'
a81c825a2a1a5aad420fbda2fd74fa38e20eb7483bb3a48fec05280705ec99b7
$ docker logs a81
Hello world
Wed Aug 25 08:36:04 PM CDT 2021