* add hadolint for dockerfile linting
* add hadofile config
* add checks for dockerfiles and shellcheck into makefile
* shellcheck fixes
* add workaround so that .env can be sourced again from version.sh
* hadolint fixes
* print progress of build/run.sh
* fix check for jq in setup.sh
relates to #41 and #26
* add compose to the build image
* update readme
* fine tuning for build container
* directly pass commands to run script in build env
* fix dockerfile so that everything can be build on Docker version 17.05.0-ce, build 9f07f0e-synology