pull planetscale credentials from doppler

prisma/schema.prisma

@@ -5,7 +5,7 @@ generator client {
 
 datasource db {
   provider             = "mysql"
-  url                  = env("PLANETSCALE_PRISMA_DATABASE_URL")
+  url                  = env("DATABASE_URL")
   referentialIntegrity = "prisma"
 }