I think you can probably declare its process clearly in some deployment script or Dockerfike published in public (github, gitlab, etc). Using Github/gitlab CI deployment script to push it automatically into any your PaaS/server provider. All the process will be transparent and can be verified.

Example:
- https://dev.to/ruthmoog/deploying-a-project-to-flyio-with-github-actions-2c7e
- https://fly.io/docs/app-guides/continuous-deployment-with-github-actions/#:~:text=create%20.github/workflows/fly.yml%20with%20these%20contents%3A