Set up google analytics within Nuxt app

Installed @nuxtjs/google-analytics module, created a UA property in Google Analytics (instead of the new Gtag one that starts with G-xxx because that doesn't work with the Nuxt module), and restart collecting analytics data. Previously already had 49 active users and 1k+ visits.

Only noticing now how much convenience Netlify provides when I have to install these stuff on my own. With Netlify, you just copy-paste the script and be done! Impressed