ASP - Core Migrate EF Core SQL DB on Startup

A note from documentation on the call to db.Database.EnsureCreated():

Note that this API does not use migrations to create the database. In addition, the database that is created cannot be later updated using migrations. If you are targeting a relational database and using migrations, you can use the DbContext.Database.Migrate() method to ensure the database is created and all migrations are applied.

You may just want to call db.Database.Migrate().

Comment taken from source found above declaration here.

You can use

db.Database.EnsureCreated();

to get your db up to date with your current model. If you want to enable migrations (If subsequent migrations are suspected), then use

db.Database.Migrate();

and put your subsequent migrations over time.