👷 Add GitLab CI

.gitlab-ci.yml

+image: node:alpine
+
+stages:
+  - test
+  - docker
+
+cache:
+  paths:
+    - node_modules/
+
+variables:
+  CONTAINER_TEST_IMAGE: git.cartooncraft.fr/osufrlive/obs-sync:$CI_BUILD_REF_NAME
+  CONTAINER_RELEASE_IMAGE: git.cartooncraft.fr/osufrlive/obs-sync:latest
+
+lint:
+  stage: test
+  script:
+    - apk add git
+    - npm i
+    - npm run lint
+
+typescript build:
+  stage: test
+  script:
+    - apk add git
+    - npm i
+    - npm run build
+
+docker build:
+  image: docker:stable
+  stage: docker
+  services:
+    - docker:dind
+  tags:
+    - docker-build
+  script:
+    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN git.cartooncraft.fr
+    - docker build --pull -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
+    # Tag as latest if on master
+    - sh -c "if [ $CI_BUILD_REF_NAME == "master" ]; then docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE && docker push $CONTAINER_RELEASE_IMAGE; fi"
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