Redirect old URLs pointing to projects.verou.me/contrast-ratio

[DmitrySharabin]

Since there is no longer a contrast-ratio repo under your user and projects.verou.me points to leaverou.github.io, the only way (at least, I couldn't find any other) to redirect URLs is to create a contrast-ratio folder with an index.html and rely on the browser's meta refresh.

To improve SEO a bit, I used a canonical link.

Closes https://github.com/LeaVerou/lea.verou.me/issues/93

[LeaVerou]

Oh I was thinking we should just replace the link where it's referenced, not redirect it here…

[DmitrySharabin]

All links are correct on our side. The issue is that leaverou.github.io/contrast-ratio (the same as projects.verou.me/contrast-ratio) doesn't exist.

We can host leaverou.github.io on Netlify and redirect everything properly. However, in that case, we'd have to manually redirect all other projects hosted on GitHub Pages (there might be many 🙂).