vercel: add page (#5278)

remove now.md page replaced by vercel

pages/common/now.md

@@ -1,28 +0,0 @@
-# now
-
-> Cloud platform for serverless deployment.
-> More information: <https://zeit.co/now>.
-
-- Deploy the current directory:
-
-`now`
-
-- Display a list of deployments:
-
-`now list`
-
-- Display information related to a deployment:
-
-`now inspect {{deployment_url}}`
-
-- Remove a deployment:
-
-`now remove {{deployment_id}}`
-
-- Log in into an account or create a new one:
-
-`now login`
-
-- Initialize an example project (a new directory will be created):
-
-`now init`