Add missing variable in compose

[galethil]

…in email-service

Checklist

• [ ] I have followed (at least) the PR section of the contributing guide.
• [ ] I fixed all necessary PR warnings
• [ ] The commit history is clean
• [ ] The E2E tests are passing
• [ ] If possible, the issue has been divided into more subtasks
• [ ] I did a self review before requesting a review from another team member

Description

Add missing variable in compose. Change AUTHENTICATION method …

How to test

1. start app using development script --full
2. Try is email-service is working correctly
3. Save email of a user via UI
4. ...

Closes #1820

[openkfwCI]

	Notes	Time
:white_check_mark:	Note for Reviewer: E2E tests on pipeline 59391 on remote server succeeded	Thu, 06 Jun 2024 08:29:12 +0000

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