Add meta description, OpenGraph and/or Twitter cards for better visibility in search engines

[msbt]

As suggested here, the SEO of our docs could do with a little improvement. Apparently the og stuff doesn't work out of the box, that's why the build process needs an update:

For OpenGraph, there's a Sphinx extension.

The meta description could/should be added like this via RST: https://docs.readthedocs.io/en/stable/guides/technical-docs-seo-guide.html#use-meta-tags

On the main website we use this as our default image for og/meta/twitter cards: https://crate.io/wp-content/uploads/2020/10/crateio-logo.png

[amotl]

On the main website we use this as our default image for og/meta/twitter cards: https://crate.io/wp-content/uploads/2020/10/crateio-logo.png

Can we also upload/use a logo variant with dimensions 320x168x72 somehow?

[amotl]

Hi Matthias,

#269 adds and activates the Sphinx extension sphinxext-opengraph to generate OpenGraph metadata (https://ogp.me/).

With kind regards,
Andreas.