feat(cli): create DB in start command if not exists (#285)

packages/backend/src/config/database.ts

@@ -4,16 +4,14 @@ import type { Knex } from 'knex';
 import knexConfig from '../../knexfile';
 import logger from '../helpers/logger';
 
-const knexInstance: Knex = knex(knexConfig);
+export const client: Knex = knex(knexConfig);
 
 const CONNECTION_REFUSED = 'ECONNREFUSED';
 
-knexInstance.raw('SELECT 1')
+client.raw('SELECT 1')
   .catch((err) => {
     if (err.code === CONNECTION_REFUSED) {
       logger.error('Make sure you have installed PostgreSQL and it is running.', err);
       process.exit();
     }
   });
-
-export default knexInstance;