Merge pull request #64 from nextcloud/contribution-guidelines

Add contribution guidelines to README

README.md

@@ -58,3 +58,47 @@ Make sure you have installed the dependencies with ```make install-deps```. Afte
 You can use the provided Makefile to run all tests by using:
 
     make test
+    
+    
+    
+## Contribution Guidelines
+
+Please read the [Code of Conduct](https://nextcloud.com/community/code-of-conduct/). This document offers some guidance to ensure Nextcloud participants can cooperate effectively in a positive and inspiring atmosphere, and to explain how together we can strengthen and support each other.
+
+For more information please review the [guidelines for contributing](https://github.com/nextcloud/server/blob/master/CONTRIBUTING.md) to this repository.
+
+### Apply a license
+
+All contributions to this repository are considered to be licensed under
+the GNU AGPLv3 or any later version.
+
+Contributors to the Spreed app retain their copyright. Therefore we recommend
+to add following line to the header of a file, if you changed it substantially:
+
+```
+@copyright Copyright (c) <year>, <your name> (<your email address>)
+```
+
+For further information on how to add or update the license header correctly please have a look at [our licensing HowTo][applyalicense].
+
+### Sign your work
+
+We use the Developer Certificate of Origin (DCO) as a additional safeguard
+for the Nextcloud project. This is a well established and widely used
+mechanism to assure contributors have confirmed their right to license
+their contribution under the project's license.
+Please read [developer-certificate-of-origin][dcofile].
+If you can certify it, then just add a line to every git commit message:
+
+````
+  Signed-off-by: Random J Developer <random@developer.example.org>
+````
+
+Use your real name (sorry, no pseudonyms or anonymous contributions).
+If you set your `user.name` and `user.email` git configs, you can sign your
+commit automatically with `git commit -s`. You can also use git [aliases](https://git-scm.com/book/tr/v2/Git-Basics-Git-Aliases)
+like `git config --global alias.ci 'commit -s'`. Now you can commit with
+`git ci` and the commit will be signed.
+
+[dcofile]: https://github.com/nextcloud/server/blob/master/contribute/developer-certificate-of-origin
+[applyalicense]: https://github.com/nextcloud/server/blob/master/contribute/HowToApplyALicense.md