Revert "Remove gitlab-ci"

This reverts commit d17b091.

.gitlab-ci.yml

@@ -0,0 +1,44 @@
+stages:
+  - lint
+  - build
+  # - test
+  - deploy
+
+lint:
+  stage: lint
+  script:
+    - docker run --rm -v $(pwd):/data yangm97/luacheck
+
+build:
+  stage: build
+  variables:
+    IMAGE: $CI_REGISTRY_IMAGE
+    TAG: $CI_COMMIT_REF_SLUG
+  before_script:
+    - apk add --no-cache py-pip
+    - pip install docker-compose
+  script:
+    - docker login -u "gitlab-ci-token" -p "$CI_JOB_TOKEN" $CI_REGISTRY
+    # - docker-compose build
+    - docker-compose -f docker-compose.webhooks.yml -f docker-compose.webhooks.override.yml build
+    - docker-compose push
+  only:
+    - staging
+    - production
+
+deploy:
+  environment:
+    name: $CI_COMMIT_REF_SLUG
+  tags:
+    - manager
+  stage: deploy
+  variables:
+    IMAGE: $CI_REGISTRY_IMAGE
+    TAG: $CI_COMMIT_REF_SLUG
+  script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+    # - docker stack deploy --with-registry-auth $CI_COMMIT_REF_SLUG -c docker-compose.yml
+    - docker stack deploy --with-registry-auth $CI_COMMIT_REF_SLUG -c docker-compose.webhooks.yml
+  only:
+    - staging
+    - production