Update README.md

Author: ghuntley

README.md

@@ -4,7 +4,7 @@ A collection of one-click buttons and scripts for deploying [code-server](https:
 
 |                                                                                                                 | Name              | Type          | Lowest-Price Plan             | Deploy                                                  |
 | --------------------------------------------------------------------------------------------------------------- | ----------------- | ------------- | ----------------------------- | ------------------------------------------------------- |
-| [![Coder](img/logo/coder.png)](https://coder.com/)                                                          | Coder             | Anything | Open Source        | [read the docs](https://coder.com/docs/coder-oss/latest)                 |
+| [![Coder](img/logo/coder.png)](https://coder.com/?utm_source=github.com/coder/deploy-code-server&utm_medium=github&utm_campaign=readme.md)                                                          | Coder             | Anything | Open Source        | [read the docs](https://coder.com/docs/coder-oss/latest?utm_source=github.com/coder/deploy-code-server&utm_medium=github&utm_campaign=readme.md)                 |
 | [![AWS EC2](img/logo/aws-ec2.png)](https://aws.amazon.com/ec2)                                                  | AWS EC2           | VM            | Free Tier, 1 CPU, 1 GB RAM    | [see guide](guides/aws-ec2.md)                          |
 | [![DigitalOcean](img/logo/digitalocean.png)](https://digitalocean.com)                                          | DigitalOcean      | VM            | $5/mo, 1 CPU, 1 GB RAM        | [see guide](guides/digitalocean.md)                     |
 | [![Vultr](img/logo/vultr.png)](https://vultr.com)                                                               | Vultr             | VM            | $3.50/mo, 1 CPU, 512 MB RAM   | coming soon                                             |