update node version

.gitlab-ci.yml

-image: node:10.14.2-stretch
+image: node:16.20.2-stretch
 stages: [setup, verify, deploy]
 install:
   stage: setup

package.json

@@ -7,9 +7,6 @@
     "type": "git",
     "url": "https://gitlab.bwg.co.kr/test/antora-ui"
   },
-  "engines": {
-    "node": ">= 8.0.0"
-  },
   "browserslist": [
     "last 2 versions"
   ],