This is an open source project, and contributions are welcome! You are welcome to open pull requests. An open pull request will be reviewed by a core developer. The review may request you to apply changes. Once the assigned reviewer is satisfied, they will merge the pull request.
As regards opening issues, please open issues pertaining to this repository at https://github.com/ooni/probe-engine/issues. Please, before opening a new issue, check whether the issue or feature request you want us to consider has not already been reported by someone else.