SSR Meta Tags integration is incomplete

[birdofpreyru]

It looks like for SSR integration of react-helmet we only have wired title and meta tags to the HTML template generation, not <link> tags we need now, nor other stuff... So we should update it, wiring up everything that makes sense, and also updating the documentation (if we have related documentation somewhere?).

[birdofpreyru]

Patch for <link> tags. Should be done for other stuff supported by React Helmet later (not a high priority right now).