Each DB call opens a new connection

[Koochr]

I'm starting the app in a docker, connected to the local arweave-node, it starts populating db, and I get repeating errors:
postgres FATAL: sorry, too many clients already
The reason is that await connection.queryBuilder() creates a new connection, and this situation becomes worse bc of pool with minimum 10 connections:
https://github.com/ArweaveTeam/gateway/blob/master/src/database/connection.database.ts#L9
Removing this line and raising db connections limit does trick for me, but this is a half-measure. The proper way is to create a single connection and reuse it.