Increase pool size to reduce ESOCKETTIMEDOUT errors

[cesarvarela]

Tests in staging are randomly failing because of timout errors:

http://localhost:8000/es/about_apps

We attempted to make an http request to this URL but the request failed without a response.

We received this error at the network level:

  > Error: ESOCKETTIMEDOUT

The number of local DNS queries has probably increased now that the graphql queries point to the local API gateway.