docs: update changelog

docs: update CHANGELOG

tests: docker compose

fix: remove slack from test workflow

fix: remove housekeeping from testing

fix: remove housekeeping scripts from docker-alerta

docs: add release notes to changelog

build: add gapit version to docker image

docs: add changelog for v1.5.0 and v1.6.0

Merge pull request #67 from gapitio/notification_delay

feat: add notification delay

build: update version to 1.5.1

docs: add v1.5.0 and remove g from version tag

build: use VERSION instead of ref_name for testing in master

build: remove mongodb tests

build: fix build_args for Dockerfile and docker build

build: remove v from relaease build arg