fix: docker-admin-ui/Dockerfile to reduce vulnerabilities (#758)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE316-OPENSSL-3314623
- https://snyk.io/vuln/SNYK-ALPINE316-OPENSSL-3314624
- https://snyk.io/vuln/SNYK-ALPINE316-OPENSSL-3314624
- https://snyk.io/vuln/SNYK-ALPINE316-OPENSSL-3314641
- https://snyk.io/vuln/SNYK-ALPINE316-OPENSSL-3314643

Author: snyk-bot

docker-admin-ui/Dockerfile

@@ -34,7 +34,7 @@ RUN cd /opt/flex/admin-ui && npm rebuild node-sass
 # Application
 # ===========
 
-FROM node:fermium-alpine3.16
+FROM node:14-alpine3.16
 
 # ======
 # alpine