Update README.md

README.md

@@ -1,16 +1,16 @@
 # Postfix Sendgrid
 
-[![CI](https://github.com/jobscore/ansible-role-postfix-sendgrid/actions/workflows/ci.yml/badge.svg)](https://github.com/jobscore/ansible-role-postfix-sendgrid/actions/workflows/ci.yml)
+[![CI](https://github.com/jobscore/ansible-role-postfix-sendgrid/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/jobscore/ansible-role-postfix-sendgrid/actions/workflows/ci.yml)
 
 Ansible Role for configuring Postfix as a Sendgrid relay on Ubuntu
 
-## Requirements
-
-TBD
-
 ## Role Variables
 
-TBD
+```
+postfix_mailname: The hostname to be used by Postfix
+sendgrid_user: Your username from Sendgrid. You can use `apikey` as the username if using API keys (recommended)
+sendgrid_password: Your password (or API key) from Sendgrid
+```
 
 ## Example Playbooks
 
@@ -22,7 +22,6 @@ TBD
 
 ## License
 
-
 [MIT](/LICENSE)
 
 Author Information