Containerize and k8sitize Onionspray

Description

Porting and merging of EOTK's pull request #110, updated and adapted to Onionspray.

Tasks

• Minimal Viable Product:
  • Initial porting of EOTK's PR #110 into Onionspray. Done at !96.
  • Dockerization with environment variable support.
  • TLS fingerprinting with JA3 and/or JA4.
  • Version pinning.
  • Testing and thorough review.
  • Cleaning up an some reorganizing.
  • Other improvements.
  • Merging into main.
• Plan further steps into the roadmap:
  • Features to consider:
    • Setting up Kubernetes.
    • Prepackaged images (with tag variants).
    • Support for image overlays.
    • Onionprobe integration.
    • Load balancing improvements (improving Onionbalance, and/or come with a solution/workaround for instances being replaced and client with old descriptions in cache still attempting access).
  • Announcement to the community, and invite for merge requests, especially for making the Helm chart (or making it more customizable/generic).