Merge pull request #7477 from diaspora/add-contributing-file

Add a Contributing file

CONTRIBUTING.md

+# Contributing to diaspora\*
+
+First of all: thank you very much for helping us out!
+
+## Things you need to know before contributing
+
+If you want to get in touch with other diaspora\* developers, [check our wiki][how-we-communicate] for information on how we communicate. Feel free to ask if you have any questions!
+
+Everyone interacting with our code, issue trackers, chat rooms, mailing lists, the wiki, and the discourse forum is expected to follow the [diaspora\* code of conduct][code-of-conduct].
+
+## Report a security issue
+
+Found a security issue? Please disclose it responsibly. We have a team of developers listening to [security@diasporafoundation.org][sec-mail]. The PGP fingerprint is [AB0D AB02 0FC5 D398 03AB 3CE1 6F70 243F 27AD 886A][pgp].
+
+## Contributing to translations
+
+We use [WebTranslateIt][webtranslateit] to manage translations of the app interface. Please read [our wiki page][translation-wiki] to find out more about this. If your language is featured on WebTranslateIt, please do **not** open a pull request to update translations. If it is not already featured on WebTranslateIt, please read the wiki article above to find out how to proceed.
+
+## Contributing to the code
+
+**Before opening a pull request** please read [how to contribute][contribute]. Doing things the right way from the start will save us time and mean that your contribution can be integrated quicker!
+- Follow our [git workflow][git-workflow] method. In particular, *do not* open a pull request from the `master` or the `develop` branch.
+- Follow our [styleguide][styleguide] and run pronto, our syntax analyzer, **locally before opening a pull request**. See [our wiki][pronto] for information on how to do this.
+- [Write tests][testing-workflow].
+- Use meaningful commit-messages and split larger tasks, e.g. refactoring, into separate commits. This makes the review process much easier.
+
+## Other ways to contribute
+
+You don’t know code? No worries, there are plenty other ways to help the diaspora* project! Please find out how you can help [on our wiki][other-ways].
+
+[code-of-conduct]: https://github.com/diaspora/diaspora/blob/develop/CODE_OF_CONDUCT.md
+[how-we-communicate]: https://wiki.diasporafoundation.org/How_we_communicate
+[pgp]: https://pgp.mit.edu/pks/lookup?op=get&search=0x6F70243F27AD886A
+[sec-mail]: mailto:security@diasporafoundation.org
+[webtranslateit]: https://webtranslateit.com/en/projects/3020-Diaspora
+[translation-wiki]: https://wiki.diasporafoundation.org/Contribute_translations
+[contribute]: https://wiki.diasporafoundation.org/Getting_started_with_contributing
+[git-workflow]: https://wiki.diasporafoundation.org/Git_Workflow
+[styleguide]: https://wiki.diasporafoundation.org/Styleguide
+[pronto]: https://wiki.diasporafoundation.org/Styleguide#Automatic_local_review
+[testing-workflow]: https://wiki.diasporafoundation.org/Testing_Workflow
+[other-ways]: https://wiki.diasporafoundation.org/Other_ways_to_contribute