✅(hub) increase max pool size

In order to run the tests we need to increase the max pool size. Only
having 4 connections in the pool is not enough and all the tests using a
transaction are failing with a tiemout error.
We have the same problem running locally so the same value is added to
the postgresql environment file

Author: lunika

.github/workflows/impress.yml

@@ -143,6 +143,7 @@ jobs:
       AWS_S3_ENDPOINT_URL: http://localhost:9000
       AWS_S3_ACCESS_KEY_ID: impress
       AWS_S3_SECRET_ACCESS_KEY: password
+      DB_PSYCOPG_POOL_MAX_SIZE: 15
 
     steps:
       - name: Checkout repository

env.d/development/postgresql

@@ -8,4 +8,5 @@ DB_HOST=postgresql
 DB_NAME=impress
 DB_USER=dinum
 DB_PASSWORD=pass
-DB_PORT=5432
+DB_PORT=5432
+DB_PSYCOPG_POOL_MAX_SIZE=15