Merge branch 'worker' into 'develop'

Docs: add Soapbox Worker to "Deploy at scale" doc

See merge request soapbox-pub/soapbox-fe!1660

docs/administration/deploy-at-scale.md

@@ -109,17 +109,4 @@ AKA "why don't links to my website show a preview when posted on Facebook/Twitte
 
 Deploying with Nginx means that you forego the link preview functionality offered by Pleroma and Mastodon, since Soapbox has no knowledge of the backend whatsoever.
 
-This problem has no official solution, but we have some ideas:
-
-1. Serve different content to link crawlers based on their `user-agent`.
-2. Inject metadata into `index.html` somehow based on the URL.
-
-The first solution is probably the most straightforward, and can be achieved in Nginx like so:
-
-```nginx
-if ($http_user_agent ~* "googlebot|bingbot|yandex|baiduspider|twitterbot|facebookexternalhit|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest\/0\.|pinterestbot|slackbot|vkShare|W3C_Validator|whatsapp") {
-  # TODO: route to backend?
-}
-```
-
-See [this snippet](https://gist.github.com/thoop/8165802) for more information.
+Our official solution is [Soapbox Worker](https://gitlab.com/soapbox-pub/soapbox-worker), a Cloudflare Worker that intercepts the reqest/response and injects metadata into the page by querying the API behind the scenes.