removed PhantomJS in favor of ChromeHeadless and upgraded Karma, removed Karma tests from Dockerfile

.gitlab-ci.yml

@@ -75,6 +75,13 @@ karma-tests:
   <<: *job
   stage: unit-tests
   script:
+    # Install Chrome
+    - set -xe
+    - curl -Ss https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
+    - echo "deb http://dl.google.com/linux/chrome/deb/ stable main" > /etc/apt/sources.list.d/google.list
+    - apt-get update -yqqq
+    - apt-get install -y google-chrome-stable
+
     - yarn test