Using a self signed certificate for docker repository in GitLab

selfsigned-certificates_gitlab-ci.yml

image: docker:stable

variables:
  DOCKER_HOST: tcp://docker:2375/
  DOCKER_DRIVER: overlay2

# from https://gitlab.com/gitlab-org/gitlab-runner/issues/1350
services:
  - name: docker:dind
    command:
      - /bin/sh
      - -c
      - wget http://MYSERVER/MYCOMPANY.crt -O /usr/local/share/ca-certificates/MYCOMPANY.crt && update-ca-certificates && dockerd-entrypoint.sh || exit

stages:
  - build

docker-image:
  stage: build
  script:
  - docker login MYREGISTRY:5000 -u $DOCKER_REGISTRY_USER -p $DOCKER_REGISTRY_PASSWORD
  - docker build -t MYREGISTRY:5000/collectd-server .
  - docker push MYREGISTRY:5000/collectd-server