Added attribution for Netlify

[SergioCasCeb]

The required attribution text for Netlify usage has been implemented, along with fixing some other small styling bugs.

Fixes #573

[netlify]

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Lighthouse	1 paths audited Performance: 54 (🟢 up 1 from production) Accessibility: 79 (no change from production) Best Practices: 100 (no change from production) SEO: 73 (no change from production) PWA: 70 (no change from production) View the detailed breakdown and full score reports

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[egekorkan]

Thanks!