npm ci and node:alpine in use for Gitlab CI

.gitlab-ci.yml

@@ -1,5 +1,3 @@
-# image: node:7.10.0
-
 stages:
     - setup
     # - test
@@ -12,31 +10,31 @@ cache:
         - node_modules/
 
 setup:
-    image: node
+    image: node:alpine
     stage: setup
     script:
-        - npm install
+        - npm ci
 
 # test:unit:
-#     image: node
+#     image: node:alpine
 #     stage: test
 #     script:
 #         - npm run test:unit
 
 # test:e2e:
-#     image: node
+#     image: node:alpine
 #     stage: test
 #     script:
 #         - npm run test:e2e
 
 ts:lint:
-    image: node
+    image: node:alpine
     stage: lint
     script:
         - npm run lint:ts
 
 sass:lint:
-    image: node
+    image: node:alpine
     stage: lint
     script:
         - npm run lint:sass