feat(srvless): websocket support (#5480)

Author: thomas-tacquet

pages/serverless-containers/how-to/add-a-custom-domain-to-a-container.mdx

@@ -47,10 +47,6 @@ Each container comes with an automatically generated domain, on which it is avai
     </Message>
 6.  Connect to your container through that custom domain once the custom domain status is `ready`.
 
-<Message type="important">
-  **Custom Domains** do not currently support websockets. If you need to use websockets, you must configure them with the original container URL.
-</Message>
-
 ## Technical details and troubleshooting
 
 Read this section if you want more details about how custom domains are handled or if you are trying to troubleshoot an issue.

pages/serverless-functions/how-to/add-a-custom-domain-name-to-a-function.mdx

@@ -45,10 +45,6 @@ Each function comes with an automatically generated domain, on which it is avail
     </Message>
 6.  Connect to your function through that custom domain once the custom domain status is `ready`.
 
-<Message type="important">
-  **Custom Domains** do not currently support websockets. If you need to use websockets, you must configure them with the original function URL.
-</Message>
-
 ## Technical details and troubleshooting
 
 Read this section if you want more details about how custom domains are handled or if you are trying to troubleshoot an issue.