update_to_node_22_(latest_lts)_and_run_npm_audit_fix_once_to_reduce_vulerabilities

[damonholden]

noticed when doing the cypress course that this repo had a load of vulnerabilities and was running off the old lts. Just changed the node version to current lts and ran an npm audit fix which has resolved most of the vulnerabilities without any breaking changes.

I know this is just a demo app and these vulnerabilities won't (shouldn't 😬) be in a production environment, but people taking the course still shouldn't be installing vulnerable code on their machine.