Unrendered partial shown in nginx proxy docs

[skovati]

Just a small error I found while searching through the docs. Looks like some embedded Ruby templating got included in .md files which doesn't get processed.

Based on a quick search, it looks like this issues exists in one more md doc.

https://fly.io/docs/app-guides/global-nginx-proxy/
https://fly.io/docs/app-guides/graphql-on-fly-with-hasura/

[bradgessler]

06a0e9f fixes this issue.

Note for future devs: when this happens in Middleman, append .erb at the end of the file if its not already there so that the file gets processed by erb.