add linting for shell scripts and Dockerfiles

* 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

.hadolint.yaml

@@ -0,0 +1,13 @@
+ignored:
+  # disable following sourced files
+  - SC1091
+  # disable check for versioned upstream image
+  - DL3006
+  # disable don't use :latest
+  - DL3007
+  # disable explicit version for apt install
+  - DL3008
+  # disable explicit version for apk install
+  - DL3018
+trustedRegistries:
+  - docker.io