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[maxaleks]

Description and Related Issue(s)

Resolves #1646

Introduced new env vars:

1. NEXT_PUBLIC_MARKETPLACE_FEATURED_APP
2. NEXT_PUBLIC_MARKETPLACE_BANNER_CONTENT_URL
3. NEXT_PUBLIC_MARKETPLACE_BANNER_LINK_URL

Checklist for PR author

• I have tested these changes locally.
• I added tests to cover any new functionality, following this guide
• Whenever I fix a bug, I include a regression test to ensure that the bug does not reappear silently.
• If I have added, changed, renamed, or removed an environment variable, I have updated the list of environment variables in the documentation and made the necessary changes to the validator script according to the guide

[tom2drum]

1. Please add some tests to cover new functionality
2. Also, please mention changes in the ENV variables in Pull request description

There should be a checklist for the author to ensure these tasks are not forgotten when creating a pull request.