[Feature] Configure the credentials of Elasticsearch

[tschaffter]

What product(s) is this feature for?

OpenChallenges

Description

Enable to configure the username and password of Elasticsearch. These credentials are included in the config of the challenge service and organization service.

cc: @zaro0508

Anything else?

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[tschaffter]

It doesn't look like the challenge and org services are using one of the built-in users for the version of ES we are using...

https://www.elastic.co/guide/en/elasticsearch/reference/7.17/built-in-users.html

[tschaffter]

In Elasticsearch 7.17, authentication and authorization are not enabled by default. However, security features, including authentication and role-based access control (RBAC), are included and can be enabled if you have a license that supports these features (Basic license or higher).

xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.http.ssl.enabled: true