feat: Express-server running

[RafaDSan]

Feature Request

Describe the Feature Request

The current protocol Swaplace is using to configure its backend and index events is the Ponder application, but this technology is not mature enough to, therefore we are limited to the Ponder's limited features meanwhile we could communicate directly with our own database, with no third-parties.

Hence, we are aiming to change it slowly, starting with deploying an express server to the railway cloud, configured to work with the current PostgreSQL.

Describe Preferred Solution

• Install express.
• config express to communicate with our deployed PostgresSQL.
• Deploy the express server to the railway platform.