support try using build environment file
refactor Dockerfile to use heredoc and RUN --mount instead of COPY
refactor Dockerfile init RUN to copy /bin and env directories from source always
user build.env and run.env for additional build and run environment
bake run.env into image
try: add entrypoint and env-file options, fix genric options
TODO: bind mount the source into the build directly (see dockerfile buildkit)
added example folder with examples
refactored: install script much more robust, allows custom target
removedj volume command from dockerfile
* fix image name generation
* add logging directory and direct output to files there
removed linked mount in try script as btrfs does not create volume directories (bind mount only now)
move packages and init into separate directories to keep cache separate
fix some minor bugs
to be more flexible passing commands or executing a script when staring container
by default will start a shell
can map host user set of to be shared directories in the container (via volumes) if HOST_MAP is set