Draft: [OPS-1161] Harden systemd service

Description

Related issue(s)

Resolves #

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • README
    • Haddock

Stylistic guide (mandatory)

• My commits comply with the following policy.
• My code complies with the style guide.