DATABASE_URL

1. cockroachlabs.com

1. Create an account. SignUp
2. Create Cluster
3. Copy General Connection String (replace '' with your database password)

2. render.com

1. Create an account https://dashboard.render.com/register?next=/

2. Click New, select PostgreSQL, Enter Name and click Create Database

3. Copy External Database URL

   

3. supabase.com

1. Create an account and Verify it. signUp
2. Click new Project, Enter Name and Password (note this password)
3. Open the Project, Open settings, open Database, Cope "Connection string" and replace [YOUR-PASSWORD] with password from step 2
4. Change "Pool Mode" to Session. The replaced Connection string as DATABASE_URL

The copied URL is DATABASEURL. That You have enter as DATABASE_URL while deploying...