Initial commit

.gitlab-ci.yml

+image: docker:19.03.1
+
+variables:
+  DOCKER_TLS_CERTDIR: "/certs"
+  IMAGE_TAG: $CI_REGISTRY_IMAGE:latest
+
+services:
+  - docker:19.03.1-dind
+
+before_script:
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+build:
+  stage: build
+  script:
+    - docker build -t $IMAGE_TAG .
+    - docker push $IMAGE_TAG

Dockerfile

+FROM graylog/graylog:3.1
+MAINTAINER Andrej Ramašeuski <andrej.ramaseuski@pirati.cz>
+RUN wget -O /usr/share/graylog/plugin/graylog-plugin-auth-sso-3.1.0.jar https://github.com/Graylog2/graylog-plugin-auth-sso/releases/download/3.0.0/graylog-plugin-auth-sso-3.1.0.jar