Switch to TypeORM's DataSource API (#299)

- Switch to TypeORM's DataSource API, rather than using the now deprecated ormconfig.json
- This will fix stage deployment not knowing how to deploy the database migrations

#297

> **NOTE:** This change requires the deployment scripts to be updated, please update them on the server before merging

Co-authored-by: Ethan Lane <ethan@vylpes.com>
Reviewed-on: https://gitea.vylpes.xyz/RabbitLabs/vylbot-app/pulls/299

package.json

@@ -9,8 +9,8 @@
     "build": "tsc",
     "start": "node ./dist/vylbot",
     "test": "jest",
-    "db:up": "typeorm migration:run",
-    "db:down": "typeorm migration:revert"
+    "db:up": "typeorm migration:run -d dist/database/dataSources/appDataSource.js",
+    "db:down": "typeorm migration:revert -d dist/database/dataSources/appDataSource.js"
   },
   "repository": {
     "type": "git",