docs: add Zenith Hosting deploy option

README.md

@@ -62,9 +62,9 @@ DocuSeal is an open source platform that provides secure and efficient digital d
 
 ## Deploy
 
-|Heroku|Railway|
-|:--:|:---:|
-| [<img alt="Deploy on Heroku" src="https://www.herokucdn.com/deploy/button.svg" height="40">](https://heroku.com/deploy?template=https://github.com/docusealco/docuseal-heroku) | [<img alt="Deploy on Railway" src="https://railway.app/button.svg" height="40">](https://railway.com/deploy/IGoDnc?referralCode=ruU7JR)|
+|Zenith|Heroku|Railway|
+|:--:|:--:|:---:|
+| [<img alt="Deploy with Zenith" src="https://cdn.zenith.hosting/buttons/deploy-with-zenith.svg" height="40">](https://zenith.hosting/host/docuseal?ref=gh) | [<img alt="Deploy on Heroku" src="https://www.herokucdn.com/deploy/button.svg" height="40">](https://heroku.com/deploy?template=https://github.com/docusealco/docuseal-heroku) | [<img alt="Deploy on Railway" src="https://railway.app/button.svg" height="40">](https://railway.com/deploy/IGoDnc?referralCode=ruU7JR)|
 |**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)