Update nginx.md
Fixed security warning, changed to "anyone who can log on to the server where your Docker Registry is running"
@@ -40,8 +40,8 @@ proxy itself.
> ***NOTE:*** Docker does not recommend binding your registry to `localhost:5000` without
> authentication. This creates a potential loophole in your Docker Registry security.
-> As a result, anyone with access to your Docker Registry can push images without
-> authentication.
+> As a result, anyone who can log on to the server where your Docker Registry is running
+> can push images without authentication.
Furthermore, introducing an extra http layer in your communication pipeline
makes it more complex to deploy, maintain, and debug. Make sure the extra
