Added gitlab ci

.gitlab-ci.yml

@@ -0,0 +1,73 @@
+image: node:lts-alpine
+
+stages:
+  - install
+  - lint
+  - test
+  - build
+
+install:
+  stage: install
+  script:
+    - npm install --prefer-offline
+  cache:
+    key:
+      files:
+        - package.json
+    paths:
+      - node_modules
+
+lint:
+  stage: lint
+  needs: ["install"]
+  script:
+    - npm run lint
+  cache:
+    key:
+      files:
+        - package.json
+    paths:
+      - node_modules
+    policy: pull
+
+test:
+  stage: test
+  needs: ["install"]
+  before_script:
+    # Download Chrome
+    - apk add chromium
+    - export CHROME_BIN=/usr/bin/chromium-browser
+    - export CHROME_PATH=/usr/lib/chromium/
+    # Download Firefox
+    - apk add firefox-esr
+    - export FIREFOX_BIN=/usr/bin/firefox
+    - export FIREFOX_PATH=/usr/lib/firefox/
+    # X Server
+    - apk add xvfb
+    - export DISPLAY=:99
+    - Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+  script:
+    - npm run test -- --browsers=Headless_Chrome --no-watch
+  cache:
+    key:
+      files:
+        - package.json
+    paths:
+      - node_modules
+    policy: pull
+
+build:
+  stage: build
+  needs: ["test", "lint"]
+  script:
+    - npm run build
+  artifacts:
+    paths:
+      - $CI_PROJECT_DIR/dist
+  cache:
+    key:
+      files:
+        - package.json
+    paths:
+      - node_modules
+    policy: pull