add package lock

[emilefokkemanavara]

The build fails because of recent changes around typescript-eslint. Let's stick to a version that works for us.

• Add package-lock
• Run npm ci instead of npm install in CI

[chris-pardy]

@emilefokkemanavara I personally use pnpm or yarn as a package manager. Curious on your thoughts of moving this to pnpm, adding a pnpm lock file etc?

[emilefokkemanavara]

@chris-pardy pnpm is fine by me. Something like this?

[chris-pardy]

@emilefokkemanavara yeah. we'll also need to update the deploy action.

[emilefokkemanavara]

@emilefokkemanavara yeah. we'll also need to update the deploy action.

done.

[emilefokkemanavara]

@chris-pardy this ok to merge?