Minor docs changes.

docs/CONTRIBUTING.rst

+Contributing
+============
+.. contents:: :local:
+
+Contact Us
+----------
+Join the Deep Learning channel here: https://chat.km3net.de/channel/deep_learning
+
+Filing Bugs or Feature Requests
+-------------------------------
+
+Please **always** create an issue when you encounter any bugs, problems or
+need a new feature. Emails and private messages are not meant to communicate
+such things!
+
+Use the appropriate template and file a new issue here:
+https://git.km3net.de/ml/OrcaSong/issues
+
+If you're not in the KM3NeT collaboration, please open an issue on github:
+https://github.com/ViaFerrata/OrcaSong/issues
+
+Please follow the instructions in the templates to provide all the
+necessary information which will help other people to understand the
+situation.
+
+Make a Fork of OrcaNet
+----------------------
+
+You create a fork (your full own copy of the
+repository), change the code and when you are happy with the changes, you create
+a merge request, so we can review, discuss and add your contribution.
+Merge requests are automatically tested on our GitLab CI server and you
+don't have to do anything special.
+
+Go to http://git.km3net.de/ml/OrcaSong and click on "Fork".
+
+After that, you will have a full copy of OrcaNet with write access under an URL
+like this: ``http://git.km3net.de/your_git_username/OrcaSong``
+
+Clone your Fork to your PC
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Get a local copy to work on (use the SSH address `git@git...`, not the HTTP one)::
+
+    git clone git@git.km3net.de:your_git_username/OrcaSong.git
+
+Now you need to add a reference to the original repository, so you can sync your
+own fork with the OrcaSong repository::
+
+    cd OrcaSong
+    git remote add upstream git@git.km3net.de:ml/OrcaSong.git
+
+
+Keep your Fork Up to Date
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To get the most recent commits (including all branches), run::
+
+    git fetch upstream
+
+This will download all the missing commits and branches which are now accessible
+using the ``upstream/...`` prefix::
+
+    $ git fetch upstream
+    From git.km3net.de:ml/OrcaSong
+     * [new branch]        branch1 -> upstream/branch1
+     * [new branch]        branch2 -> upstream/branch2
+
+
+If you want to update for example your **own** ``master`` branch
+to contain all the changes on the official ``master`` branch of OrcaNet,
+switch to it first with::
+
+    git checkout master
+
+and then merge the ``upstream/master`` into it::
+
+    git merge upstream/master
+
+Make sure to regularly ``git fetch upstream`` and merge changes to your own branches.
+
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+DISCLAIMER: This is totally copy & pasted & modified from the excellent km3pipe equivalent.

docs/index.rst

@@ -37,7 +37,7 @@ Please feel free to contact me or just open an issue on Gitlab / Github if you h
    :caption: Contents:
 
    getting_started
-   contributing_link
+   CONTRIBUTING
    Source (Git) <https://git.km3net.de/ml/OrcaSong.git>
 
 Indices and tables