Bitrot and nvm use lts/fermium

[gl-yziquel]

Seems like the code has suffered from bitrot. The execution of npm install complains about the package-lock.json having been generated by an old version. Executing nvm use lts/fermium seems to partially solve that issue: it does not complain about package-lock.jsonhaving been generated by some old version.

The command npm install howevers fails with other errors, somewhat non-deterministically.