Support new Node:LTS image? (upgrading from 14 to 16)

Per 26 OCT 2021 new Node:Lts became Active LTS: node:16

This is causing build fails in the CI pipeline because package mismatches. Therefor as a fix I rolled back the CI config file to image: node:14 (it was: node:lts)

Node:14 has EOL April 2023 so there is some time.

• Gitlab CI integrity: https://dev.to/drakulavich/gitlab-ci-cache-and-artifacts-explained-by-example-2opi
• Node release schedule: https://nodejs.org/en/about/releases/
• Rollback: !113 (9bb174bd)