Facebook login (URL blocked)

I have an option for users to sign via Facebook. I'm using Socialite package. Everything works fine on local server, but in production I am getting an error which says that URL is blocked. I know that URL needs to be assigned in Facebook application, and I've entered (for example myapp.com/redirect). But when I click Login button, in browser I get an URI: uri=http%3A%2F%2Flocalhost%3A8000% ... Where can I change this to myapp.com ? I've set an application to production mode config/app.php, and also APP_URL to http://myapp.com...