Some cookies are misusing the recommended “SameSite“ attribute

Description:

After upgrading to 6.0.0 we're seeing the next trace in our browser console logs when we try to access the page:

     Cookie “rc_uid” does not have a proper “SameSite” attribute value. Soon, cookies without the “SameSite” attribute or with an invalid value will be treated as “Lax”. This means that the cookie will no longer be sent in third-party contexts. If your application depends on this cookie being available in such contexts, please add the “SameSite=None“ attribute to it. To know more about the “SameSite“ attribute, read https://developer.mozilla.org/docs/Web/HTTP/Headers/Set-Cookie/SameSite
     Cookie “rc_token” does not have a proper “SameSite” attribute value. Soon, cookies without the “SameSite” attribute or with an invalid value will be treated as “Lax”. This means that the cookie will no longer be sent in third-party contexts. If your application depends on this cookie being available in such contexts, please add the “SameSite=None“ attribute to it. To know more about the “SameSite“ attribute, read https://developer.mozilla.org/docs/Web/HTTP/Headers/Set-Cookie/SameSite

Steps to reproduce:

1. Upgrade from 5.1.0 to 6.0.0
2. Open the rocketchat url in a browser
3. See error in the browser console logs

Expected behavior:

No error in the logs

Actual behavior:

Server Setup Information:

• Version of Rocket.Chat Server: 6.0.0
• Operating System: Ubuntu
• Deployment Method: docker
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: 14.21.2 - x64
• MongoDB Version: 5.0.15

Client Setup Information

• Desktop App or Browser Version: irrelevant
• Operating System: irrelevant

Additional context

Relevant logs:

Start by tracing where the rc_uid and rc_token cookies are set during the 5.1.0-to-6.0.0 upgrade; the report names no source files, tests, or entry points. Reproduce the browser console warning and verify that both cookies use a valid SameSite value without introducing authentication regressions.