fix: imports (#282)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Refactor**
* Internal code organization improved for better maintainability. No
changes to user-facing functionality or behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: csikb

src/database/index.ts

@@ -1,3 +1 @@
-import postgres from './postgres.js'
-
-export { postgres }
+export { default as postgres } from './postgres.js'

src/middleware/index.ts

@@ -1,6 +1,4 @@
-import bodyParser from './bodyparser.js'
-import compress from './compress.js'
-import helmet from './helmet.js'
-import postGraphile from './postgraphile.js'
-
-export { bodyParser, compress, helmet, postGraphile }
+export { default as bodyParser } from './bodyparser.js'
+export { default as compress } from './compress.js'
+export { default as helmet } from './helmet.js'
+export { default as postGraphile } from './postgraphile.js'

src/router/index.ts

@@ -1,3 +1 @@
-import healthRouter from './health.js'
-
-export { healthRouter }
+export { default as healthRouter } from './health.js'