* refactor: update mailer service to stop using postmark
* chore: remove postmark as a dep and move out postmark code
* chore: remove postmark variables from .env.example
* chore: add formal errors for mailer initialization errors
* chore: add and update jsdoc comments in mailer service methods
* chore: completed base auth implementation with redirectUrl
* chore: completed base auth fix with redirect_uri
* chore: added whitelist based redirection
* chore: added a env variable for session secret in main.ts
* chore: removed migrations folder from prisma directory