CI: Cache static assets.

Change-Id: I3e74623513c592c0ddad37a29fc0e1c5f5bf88ab
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e008770..69f51ac 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,6 +17,8 @@
   key: $CI_JOB_NAME
   paths:
     - .m2/repository
+    - src/main/resources/META-INF/resources/.parcel-cache
+    - src/main/resources/META-INF/resources/node_modules
 
 variables:
   MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"