Update README.md

Author: scale-tone

README.md

@@ -102,7 +102,7 @@ By default there will be **no authentication** configured for your Static Web Ap
 
 Thanks to [MobX](https://mobx.js.org/README.html), this React app looks very much like a typical [MVVM](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93viewmodel) app. It has a [hierarchy of state objects](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/tree/master/src/states) (aka viewmodels) and a corresponding [hierarchy of pure (stateless) React components](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/tree/master/src/components) (aka views). These two hierarchies are welded together at the root level [here](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/index.tsx#L11). For example, [here](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/states/SearchResultsState.ts) is the state object, that represents the list of search results, and [here](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/components/SearchResults.tsx) is its markup.
 
-[HTTP GET requests](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/states/DetailsDialogState.ts#L102) to Azure AI Search REST API are made by means of [axios](https://www.npmjs.com/package/axios). As mentioned before, they do not go directly to Azure AI Search, but are transparently proxied via [these Azure Proxies](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/api/proxies.json) - this is where the **api-key** is being applied to them.
+[HTTP GET requests](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/states/DetailsDialogState.ts#L102) to Azure AI Search REST API are made by means of [axios](https://www.npmjs.com/package/axios) and are transparently proxied through a [lightweight Azure Functions-based backend](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/tree/master/api) - this is where the **api-key** is being applied to them.
 
 The list of facets and their possible values on the left sidebar is [generated dynamically](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/states/FacetsState.ts#L15), based on **CognitiveSearchFacetFields** config value and results returned by Azure AI Search. The type of each faceted field (and the way it needs to be visualized) is also detected dynamically [here](https://github.com/scale-tone/cognitive-search-static-web-apps-sample-ui/blob/master/src/states/FacetState.ts#L49). Multiple faceted field types is currently supported already, and more support is coming.