[docs] update selfhosting docs

docs/versions/unversioned/distribution/hosting-your-app.md

@@ -9,7 +9,7 @@ For simplicity, the rest of this article will refer to hosting an app for the An
 
 ## Export app
 
-First, you’ll need to export all the static files of your app so they can be served from your CDN. To do this, run `expo export` in your project directory and it will output all your app’s static files to a directory named `dist`.  Asset and bundle files are named by the md5 hash of their content. Your output directory should look something like this now:
+First, you’ll need to export all the static files of your app so they can be served from your CDN. To do this, run `expo export --public-url <server-endpoint>` in your project directory and it will output all your app’s static files to a directory named `dist`.  In this guide, we will use `https://quinlanj.github.io/self-host` as our example server endpoint. Asset and bundle files are named by the md5 hash of their content. Your output directory should look something like this now:
 ```
 .
 ├── android-index.json

docs/versions/v31.0.0/distribution/hosting-your-app.md

@@ -9,7 +9,7 @@ For simplicity, the rest of this article will refer to hosting an app for the An
 
 ## Export app
 
-First, you’ll need to export all the static files of your app so they can be served from your CDN. To do this, run `expo export` in your project directory and it will output all your app’s static files to a directory named `dist`.  Asset and bundle files are named by the md5 hash of their content. Your output directory should look something like this now:
+First, you’ll need to export all the static files of your app so they can be served from your CDN. To do this, run `expo export --public-url <server-endpoint>` in your project directory and it will output all your app’s static files to a directory named `dist`.  In this guide, we will use `https://quinlanj.github.io/self-host` as our example server endpoint. Asset and bundle files are named by the md5 hash of their content. Your output directory should look something like this now:
 ```
 .
 ├── android-index.json