Udpate dbm and auth urls

[devindford]

Description

Updates the URLs for dbm and auth to only include the port if the env var is defined

How to test

• Pull this branch
• run docker-compose --profile dbm up
• goto localhost:3000
• ensure the product order ticker shows up
• run docker-compose --profile dbm down
• goto your .env.local file and remove the NEXT_PUBLIC_DBM_PORT
• run docker-compose --profile dbm up
• check the network tab for the site now and you should see that the get-item route is failing and the url should show without the port now