Docker CI fails

[mtrezza]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest versions of Parse Server and Parse Dashboard.

Issue Description

Docker CI fails.

Steps to reproduce

See for example https://github.com/parse-community/parse-dashboard/runs/4028281085?check_suite_focus=true.

The reason is that #1792 changed the docker image from discrete 12-alpine to lts-alpine, which does not give consistency anymore over the node version in our CI. Something doesn't work with the Node 16 alpine image, so reverting to Node 14 for now. Eventually we'll have to look into what it's failing with lts though.

Actual Outcome

Docker CI fails.

Expected Outcome

Docker CI should build.

Environment

n/a

Logs

n/a

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