docs: add a title to the readme

README.md

@@ -1,5 +1,7 @@
 <img src="https://share.adam.ac/21/logo-g3hWemROTemCYbWlmL.svg" width="250" />
 
+# Welcome to Postal
+
 **Postal** is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers. Postal is developed by [Krystal](https://k.io) to serve its own mail processing requirements and we have since decided that it should be released as an open source project for the community.
 
 ![Screenshot](https://share.adam.ac/17/k4lA5OuPlU2.png)