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

build/Dockerfile

@@ -1,6 +1,6 @@
 FROM docker:18.09.1
 ENV COMPOSE_VERSION "1.23.2"
-RUN apk add bash curl expect make nano jq py-pip
+RUN apk add --no-cache bash curl expect make nano jq py-pip
 RUN pip install --no-cache-dir docker-compose==${COMPOSE_VERSION}
 WORKDIR /kopano-docker
 CMD ["bash"]

build/run.sh

@@ -3,11 +3,13 @@ if [ ! "$(id -u)" -eq 0 ]; then
 	echo "This script may need to be run as root to be able to use docker/docker-compose through it."
 fi
 
-cd "$(dirname "$0")"
+cd "$(dirname "$0")" || exit
+
+docker build .
 
 docker run \
 	--rm -it \
-	-u $(id -u ${USER}):$(id -g ${USER}) \
+	-u "$(id -u)":"$(id -g)" \
 	-v /var/run/docker.sock:/var/run/docker.sock \
-	-v ${PWD}/..:/kopano-docker/ \
-	$(docker build -q .) $@
+	-v "$(pwd)"/..:/kopano-docker/ \
+	"$(docker build -q .)" "$@"