Typo: append should actually be prepend (#348)

Https should be put before (prepend) the url, so prepend should be the correct word. Append would mean you put it after.

docs/getting-started/sharing-your-first-site.md

@@ -18,7 +18,7 @@ expose share http://localhost:3000
 expose share my-local-site.dev
 ```
 
-By default, Expose assumes that you want to share unenecrypted local traffic through HTTP. If you want to share a local HTTPS URL append the protocol to the url, like this:
+By default, Expose assumes that you want to share unenecrypted local traffic through HTTP. If you want to share a local HTTPS URL prepend the protocol to the url, like this:
 
 ```bash
 # Will share access to https://my-local-site.dev 
@@ -30,4 +30,4 @@ expose share https://my-local-site.dev
 
 To make your life easier, Expose tries to share your local URLs using custom subdomains. This allows you to share your local URL `my-local-site.dev` as `my-local-site.us-1.sharedwithexpose.com`.
 
-By default, Expose uses a slugified version of the URL that you want to share, but you can also [choose your own custom subdomain](/docs/client/sharing#share-a-local-site-with-a-given-subdomain).
+By default, Expose uses a slugified version of the URL that you want to share, but you can also [choose your own custom subdomain](/docs/client/sharing#share-a-local-site-with-a-given-subdomain).