add database/schema migrations support

[enriquezrene]

The API works using a SQL database, we need to add support to DB/schema migrations so we can make evolve the DB structure whenever it is needed.

Acceptance Criteria

• DB/schema migrations support is added (https://en.wikipedia.org/wiki/Schema_migration)
• README file should be updated with required instructions to run db migrations up and down
• Current db seeder implementation should be revisited and removed

[EliuX]

I will implement this migration system but for Cosmos DB