- added doc

deploy_mediaconch/README.txt

+
+How to build mediaconch for Redhat system used by Rosetta
+====================================================================
+
+:lang: en
+:encoding: utf-8
+:author: Andreas Romeyke
+
+== Prerequisites
+
+* you need 'docker'
+* If using Debian buster or higher, you must(!) add "vsyscall=emulate" option
+to the Linux kernel boot option, because CentOS 6.xx triggers syscalls in an
+outdated way.
+
+== How to build
+
+# If something was built, delete all containers for specific image:
+docker ps -a | awk '{ print $1,$2 }' | grep mediaconch | awk '{print $1 }' | xargs -I {} docker rm {}
+
+# build stuff
+docker build -t mediaconch --rm=true ./
+
+== find out which image
+
+docker images
+
+lists:
+REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
+mediaconch          latest              acc13d4a83d9        3 minutes ago       827 MB
+<none>              <none>              e3be26e603f0        5 minutes ago       824 MB
+centos              6.8                 0cd976dc0a98        10 months ago       195 MB
+
+
+== How to copy already built binaries
+
+id=$(docker create mediaconch)
+
+docker cp $id:/tmp/mediaconch.tgz ./
+
+docker rm -v $id