Add GitLab specific HTTP checks and improve logging

[olivierpons]

This PR adds the following improvements:

• Add specific HTTP status code checks for GitLab (200, 301, 302, 303)
• Add timestamps to log messages for better debugging
• Use curl when available, fallback to TCP check
• Adjust sleep interval to 5 seconds to reduce server load
• Improve error handling with HTTP status codes

This is particularly useful when waiting for GitLab to be fully operational, as it checks not just the port availability but also the HTTP response.

[atkrad]

Hello @olivierpons, As a suggestion, you can use Wait4X, which covers all those features.