CI updates

.gitlab-ci.yml

@@ -1,12 +1,24 @@
 stages:
+    - install
     - lint
     - test
     - publish
     - deploy
 
+install:
+    image: node:12
+    stage: setup
+    script:
+        - npm ci
+    artifacts:
+        paths:
+            - node_modules
+        expire_in: 1 week
+
 test:
     image: python:3.7
     stage: test
+    needs: []
     services:
         - postgres:12
     variables:
@@ -25,6 +37,7 @@ test:
 lint:pycodestyle:
     image: python:3.7
     stage: lint
+    needs: []
     script:
         - pip install pycodestyle
         - pycodestyle --config=setup.cfg --count .
@@ -32,22 +45,21 @@ lint:pycodestyle:
 lint:eslint:
     image: node:alpine
     stage: lint
-    before_script:
-        - npm install
+    needs: ["install"]
     script:
         - npm run eslint
 
 lint:remark:
     image: node:alpine
     stage: lint
-    before_script:
-        - npm install
+    needs: ["install"]
     script:
         - npm run remark
 
 publish:
     stage: publish
     image: docker:stable
+    needs: ["test", "lint:pycodestyle", "lint:eslint", "lint:remark"]
     services:
         - docker:stable-dind
     only: