[Frontend] Modify Calls Using Full Addresses to Utilize Environment Variables

[rosseti]

Description:
Currently, our project contains calls that use hardcoded full addresses like (http://localhost...), leading to inflexibility and potential issues. To improve maintainability and adaptability, we should modify these calls to utilize environment variables.

Tasks:

• Identify all instances where full addresses are used in the code.
• Replace hardcoded addresses with environment variables.
• Update documentation to reflect the changes.
• Test the modified code to ensure functionality remains intact.

Acceptance Criteria:

• Codebase should no longer contain hardcoded full addresses.
• The application should function correctly after the modification.
• Documentation should accurately represent the updated configuration.

Additional Context:
This modification is essential for better code organization, easier configuration changes, and increased portability. Ensure thorough testing before merging the changes into the main branch.