refactor src/ to be just a basic build
add examples
write up help.md and usage subcommand
add test folder for dev testing
improve install script
many numerous improved to build script,
moved portions of build script to functions in helpers.lib
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