chore(compose): switch to stable Prometheus version

[vprashar2929]

This commit updates the compose config to use a stable Prometheus version instead of the main development version.
Additionally, it resolves an issue where Prometheus could not scrape metrics from Scaphandre, which was failing due to an invalid Content-Type header in Scaphandre's response.

[github-actions]

🤖 SeineSailor

Here is a concise summary of the pull request changes:

Summary: This pull request updates the Prometheus version in the Compose configuration from a development version to v2.55.0, resolving an issue with invalid Content-Type headers when scraping metrics from Scaphandre.

Key Modifications:

• The FROM directive in the Dockerfile is updated to use quay.io/prometheus/prometheus:v2.55.0 instead of quay.io/prometheus/prometheus:main.

Impact: This change is expected to have no impact on the external interface or behavior of the code, as it only updates the Prometheus version. However, it resolves a specific issue with metric scraping from Scaphandre.

Observations/Suggestions: It's a good practice to keep dependencies up-to-date, and this change ensures that the Prometheus version is pinned to a specific release, reducing potential issues with future development versions.

[vprashar2929]

Ref:

[sthaha]

Lets use the latest as it point to the latest stable release
https://quay.io/repository/prometheus/prometheus?tab=tags&tag=latest