Fix: Issue #112 - Improve environment configuration and reset token handling

[Sakshi-shukla01]

Description

This pull request addresses Issue #112 by improving the handling of environment variables and reset token behavior.

Changes

• Updated the .env.example file to provide clearer and more accurate configuration options
• Ensured that RESET_TOKEN is used from the environment when provided
• Added fallback logic to generate a readable token only when RESET_TOKEN is not set
• Improved handling of STATS_FILE_PATH to prevent file path issues across environments
• Aligned configuration behavior with Docker setup and README documentation

Fixes

• Prevents RESET_TOKEN from being regenerated unnecessarily
• Resolves ENOENT errors caused by invalid or non-existent stats file paths
• Ensures consistent behavior in both local and containerized environments

Testing

• Verified application runs correctly using npm on a custom port
• Confirmed stats file is created and updated correctly
• Tested reset functionality using a manually provided RESET_TOKEN
• Ensured no runtime errors occur due to missing files or misconfiguration

Notes

• No breaking changes introduced
• Fully backward compatible

Closes #112

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[lkocman]

Hello, I'll review and merge this after this week's SUSECON/ODS. I don't want to risk anything this week :-) Thanks @Sakshi-shukla01