docs: update readme

README.md

@@ -1,8 +1,9 @@
-![welcome](https://github.com/postalserver/postal/assets/4765/37e6c405-058a-43c6-be30-7149d873561d)
+![GitHub Header](https://github.com/postalserver/.github/assets/4765/7a63c35d-2f47-412f-a6b3-aebc92a55310)
 
-**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.
+**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. 
 
 * [Documentation](https://docs.postalserver.io)
-* [Installation Instructions](https://docs.postalserver.io/install/prerequisites)
+* [Installation Instructions](https://docs.postalserver.io/getting-started)
 * [FAQs](https://docs.postalserver.io/welcome/faqs) & [Features](https://docs.postalserver.io/welcome/feature-list)
-* [Ask for help](https://github.com/postalserver/postal/discussions)
+* [Discussions](https://github.com/postalserver/postal/discussions) - ask for help or request a feature
+* [Join us on Discord](https://discord.postalserver.io)