The two warnings are totally unrelated.
For the DataProtection warning, I recommend following the guidance presented here on the official ASP.Net Core documents. If you care to dig in deeper as to the relevant source code and decision, you can see this relevant ASP.Net GitHub PR.
For the https redirection warning, I recommend simply removing the https redirection policy from the startup.cs file which is typically defined via app.UseHttpsRedirection(); unless you’re actually using this policy for your container and in this case you’d need to actually setup the certificates and expose the HTTPS port on your container.