Write Database Connection Setup Code For TestDB

[elraphty]

Context

We currently have a database connection setup for the production database in db/config.go, the config.go file has the initDB function which connects to the Database, and migrates the database tables schemas.

Design

We want to create a new file in the db folder test_config.go which will connect to the test DB and migrate the table schemas for the test DB.

Create a new global variable TestDB in test_config.go with the type of database, and set TestDB.db to the Test Database connection, the db.TestDB will be used to replace the mocked databases in the test handlers.

Acceptance Criteria

• I've tested on Chrome
• I've created a test that...
• I have rebased and tested locally before submitting my PR
• I can submit a PR within 1 day of taking the bounty

Here is an example backend test