chore: updates config to use postgres direct & pooling connections

Author: anthonydmays

lib/javascript/fullstack_demo/.env.example.postgres

@@ -2,4 +2,5 @@ NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY=Your Next Public Clerk Publishable Key here
 CLERK_SECRET_KEY=Your Clerk Secret Key here
 DB_TYPE=postgres
 NEXT_PUBLIC_API_URL=http://localhost:3000
-DATABASE_URL=Your Postgres database URL
+DATABASE_URL=Your Postgres connection pooling database URL
+DIRECT_URL=Your Postgres direct database URL

lib/javascript/fullstack_demo/prisma/schema.prisma

@@ -3,8 +3,9 @@ generator client {
 }
 
 datasource db {
-  provider = "postgresql"
-  url      = env("DATABASE_URL")
+  provider  = "postgresql"
+  url       = env("DATABASE_URL")
+  directUrl = env("DIRECT_URL")
 }
 
 /// This table has subclasses and requires additional setup for migrations. Visit https://pris.ly/d/table-inheritance for more info.