https://www.youtube.com/watch?v=FupLQ7y9oy0&t=6s&ab_channel=FrankLiu
Initialization of DB context with an explanation of relationships between different tables
Below must be added to both product and inventory classes in core business
public List<ProductInventory> ProductInventories {get; set;} = new List<ProductInventory>();
Must Seed data at end of ITMScontext