Not containers to blame but overprovisioning and how much resources dedicated to building. I am not sure how Vercel gets things build in literal seconds, but, hey, they are the creators of NextJS.
At DollarDeploy we building it also in containers but every build get 4GB/2CPU so it is quite fast but not as fast as Vercel.
At DollarDeploy we building it also in containers but every build get 4GB/2CPU so it is quite fast but not as fast as Vercel.