feat(node): create dockerfile for node 12

2 jobs for master in 1 minute and 18 seconds (queued for 2 seconds)
Name Stage Failure
build12 Build
$ /bin/sh build.sh 12
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Login Succeeded
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See

unable to prepare context: unable to evaluate symlinks in Dockerfile path: lstat /builds/docker/cypress/12/Dockerfile: no such file or directory
ERROR: Job failed: exit code 1