Add unofficial Helm chart notice to deploy docs

README.md

@@ -68,6 +68,10 @@ DocuSeal is an open source platform that provides secure and efficient digital d
 |**DigitalOcean**|**Render**|
 | [<img alt="Deploy on DigitalOcean" src="https://www.deploytodo.com/do-btn-blue.svg" height="40">](https://cloud.digitalocean.com/apps/new?repo=https://github.com/docusealco/docuseal-digitalocean/tree/master&refcode=421d50f53990) | [<img alt="Deploy to Render" src="https://render.com/images/deploy-to-render-button.svg" height="40">](https://render.com/deploy?repo=https://github.com/docusealco/docuseal-render)
 
+#### Kubernetes (Unofficial Helm Chart)
+
+Community-maintained Helm chart (not maintained by the DocuSeal team): [Antigenic-OSS/docuseal-helm-chart](https://github.com/Antigenic-OSS/docuseal-helm-chart)
+
 #### Docker
 
 ```sh