Update redirects base for subdomain consolidation (#304)

* Update redirects base for subdomain consolidation

* subdomain: add /docs to s3 prefix

Author: schmalliso

config/redirects

@@ -1,5 +1,5 @@
-define: prefix drivers/node
-define: base https://docs.mongodb.com/${prefix}
+define: prefix docs/drivers/node
+define: base https://www.mongodb.com/${prefix}
 define: versions v3.6 v3.7 v4.0 v4.1 v4.2 v4.3 v4.4 master
 
 raw: ${prefix}/ -> ${base}/current/