Separate out testing dependencies to be more independent of travis

* move docker-hub-helper in a general ci folder
* move installation of tools into dedicated script (will make it easier to use a different ci platform)
* mention the setup-tools script in contributing and move testing instructions in there as well

.ci/docker-hub-helper.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+# bash .travis/docker-hub-helper.sh base
+
+set -euo pipefail
+IFS=$'\n\t'
+
+# this is a kind of ugly hack to be able to source the env file
+# this is sadly needed since postfix in https://github.com/tomav/docker-mailserver/ cannot deal with quoted values
+tmpfile=$(mktemp /tmp/kopano-docker-env.XXXXXX)
+cp ./.env "$tmpfile"
+sed -i '/LDAP_QUERY_FILTER/s/^/#/g' "$tmpfile"
+sed -i '/SASLAUTHD_LDAP_FILTER/s/^/#/g' "$tmpfile"
+# shellcheck disable=SC1090
+source "$tmpfile"
+
+docker_repo=${docker_repo:-zokradonh}
+docker_login=${docker_login:-""}
+docker_pwd=${docker_pwd:-""}
+
+if [ -z "$docker_login" ]; then
+	docker_login="$(<~/.docker-account-user)"
+fi
+
+if [ -z "$docker_pwd" ]; then
+	docker_pwd="$(<~/.docker-account-pwd)"
+fi
+
+image=${1:-""}
+if [ -z "$image" ]; then
+	echo "ERROR: You must specify an image to modify."
+	exit 1
+fi
+
+# below code is based on https://github.com/moikot/golang-dep/blob/aab3ea8462a19407544f1ce9daa11c3f0924394c/.travis/push.sh
+#
+# Pushes README.md content to Docker Hub.
+#
+# $1 - The image name.
+# $2 - The JWT.
+#
+# Examples:
+#
+#   push_readme "foo/bar" "token"
+#
+push_readme() {
+	declare -r image="${1}"
+	declare -r token="${2}"
+	declare -r readme="${3}"
+
+	local code
+	code=$(jq -n --arg msg "$(<"${readme}")" \
+		'{"registry":"registry-1.docker.io","full_description": $msg }' | \
+			curl -s -o /dev/null  -L -w "%{http_code}" \
+				https://cloud.docker.com/v2/repositories/"${image}"/ \
+				-d @- -X PATCH \
+				-H "Content-Type: application/json" \
+				-H "Authorization: JWT ${token}")
+
+	if [[ "${code}" = "200" ]]; then
+		printf "Successfully pushed README to Docker Hub"
+	else
+		printf "Unable to push README to Docker Hub, response code: %s\n" "${code}"
+		exit 1
+	fi
+
+	local code
+	code=$(jq -n --arg msg "$(head -n 1 "${readme}" | cut -d' ' -f2-)" \
+		'{"registry":"registry-1.docker.io","description": $msg }' | \
+			curl -s -o /dev/null  -L -w "%{http_code}" \
+				https://cloud.docker.com/v2/repositories/"${image}"/ \
+				-d @- -X PATCH \
+				-H "Content-Type: application/json" \
+				-H "Authorization: JWT ${token}")
+
+	if [[ "${code}" = "200" ]]; then
+		printf "Successfully pushed description to Docker Hub"
+	else
+		printf "Unable to push description to Docker Hub, response code: %s\n" "${code}"
+		exit 1
+	fi
+}
+
+# Login into Docker repository
+#echo "$docker_pwd" | docker login -u "$docker_login" --password-stdin
+
+token=$(curl -s -X POST \
+-H "Content-Type: application/json" \
+-d '{"username": "'"$docker_login"'", "password": "'"$docker_pwd"'"}' \
+https://hub.docker.com/v2/users/login/ | jq -r .token)
+
+push_readme "${docker_repo}"/kopano_"${image}" "${token}" "${image}"/README.md
+
+if [ -e "$tmpfile" ]; then
+	rm "$tmpfile"
+fi

.ci/setup-tools.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+HADOLINT_VERSION=1.17.1
+DOCKER_COMPOSE_VERSION=1.23.2
+TRIVY_VERSION=0.1.1
+GOSS_VERSION=0.3.7
+COMMANDER_VERSION=1.2.1
+
+if ! command -v hadolint > /dev/null; then
+	sudo curl -L "https://github.com/hadolint/hadolint/releases/download/v$HADOLINT_VERSION/hadolint-$(uname -s)-$(uname -m)" -o /usr/local/bin/hadolint
+	sudo chmod +rx /usr/local/bin/hadolint
+fi
+
+if ! command -v docker-compose > /dev/null; then
+	sudo curl -L "https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+	sudo chmod +rx /usr/local/bin/docker-compose
+fi
+
+if ! command -v trivy > /dev/null; then
+	wget https://github.com/knqyf263/trivy/releases/download/v${TRIVY_VERSION}/trivy_${TRIVY_VERSION}_Linux-64bit.tar.gz
+	sudo tar zxvf trivy_${TRIVY_VERSION}_Linux-64bit.tar.gz -C /usr/local/bin trivy
+fi
+
+if ! command -v goss > /dev/null; then
+	sudo curl -L https://github.com/aelsabbahy/goss/releases/download/v$GOSS_VERSION/goss-linux-amd64 -o /usr/local/bin/goss
+	sudo chmod +rx /usr/local/bin/goss
+fi
+
+if ! command -v dcgoss > /dev/null; then
+	sudo curl -L https://raw.githubusercontent.com/fbartels/goss/dcgoss-v2/extras/dcgoss/dcgoss -o /usr/local/bin/dcgoss
+	sudo chmod +rx /usr/local/bin/dcgoss
+fi
+
+if ! command -v commander > /dev/null; then
+	sudo curl -L https://github.com/SimonBaeumer/commander/releases/download/v$COMMANDER_VERSION/commander-linux-amd64 -o /usr/local/bin/commander
+	sudo chmod +rx /usr/local/bin/commander
+fi
+
+if ! command -v commander > /dev/null; then
+	sudo curl -L https://raw.githubusercontent.com/fbartels/dccommander/master/dccommander -o /usr/local/bin/dccommander
+	sudo chmod +rx /usr/local/bin/commander
+fi
+
+if ! command -v expect > /dev/null; then
+	sudo apt update && sudo apt install -y expect
+fi
+
+if ! command -v yamllint > /dev/null; then
+	sudo pip install --upgrade pip && sudo pip install yamllint
+fi
+
+if ! command -v eclint > /dev/null; then
+	npm install -g eclint
+fi