docs: add Sealos deployment option

README.md

@@ -62,11 +62,11 @@ 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)|
-|**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)
+|Heroku|Railway|Sealos|
+|:--:|:---:|:---:|
+| [<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) | [<img alt="Deploy on Sealos" src="https://sealos.io/Deploy-on-Sealos.svg" height="40">](https://sealos.io/products/app-store/docuseal/) |
+|**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) | |
 
 #### Docker