added book us badge (#1057)

README.md

@@ -61,6 +61,12 @@ Our <a href="https://crowd.dev/#waitlist">cloud version</a> is a fast, easy and
 
 To get started with self-hosting, take a look at our [self-hosting docs](https://docs.crowd.dev/docs/getting-started-with-self-hosting).
 
+### Contact us
+
+Call with a crowd.dev team member to learn more about our product and make sure you get the most out of it.
+
+<a href="https://cal.com/team/CrowdDotDev/intro-to-crowd-dev/"><img alt="Book us with Cal.com" src="https://cal.com/book-with-cal-dark.svg" /></a>
+
 #### Deployment with Kubernetes
 
 Our services can be deployed using Kubernetes, as well as a lightweight development environment using Docker. You can read more about it in our [self-hosting docs](https://docs.crowd.dev/docs/deployment).