Explain how to build Cutter docs (#2380)

docs/source/contributing.rst

@@ -24,6 +24,6 @@ So you like Cutter and want to get involved? Great! This part of the documentati
    :titlesonly:
 
    contributing/code
-   Contributing Documentation <contributing/docs/getting-started>
+   contributing/docs
    contributing/translations/getting-started
    contributing/plugins/getting-started

docs/source/contributing/docs.rst

@@ -0,0 +1,8 @@
+Contributing Documentation
+==========================
+
+.. toctree::
+   :maxdepth: 2
+   
+   Getting Started <docs/getting-started>
+   docs/building-docs

docs/source/contributing/docs/building-docs.rst

@@ -0,0 +1,37 @@
+Building docs
+=======================
+
+This page explains the steps that are needed to build Cutter's documentation.
+
+Requirements
+------------
+
+You will need:
+
+* doxygen
+* python3
+* pip3
+
+  * sphinx
+  * breathe
+  * recommonmark
+
+On Debian-based Linux distributions, the packages above can be installed with the following command.
+
+.. code:: sh
+
+   sudo apt install make doxygen python3-pip doxygen
+   sudo pip3 install sphinx breathe recommonmark
+
+Then, you can build the documentation with the following commands:
+
+.. code:: sh
+
+   cd cutter/docs/
+   make html
+
+.. tip::
+
+   If you do not need API documentation, type ``make quick`` instead of ``make html``.
+   
+You can find the generated html files at ``cutter/docs/build``. Open ``cutter/docs/build/html/index.html`` with your browser to visit the index file of your local copy of the documentation.

docs/source/contributing/docs/getting-started.rst

@@ -16,8 +16,7 @@ How can you help?
 
 The following sections suggest ways you can contribute to Cutter's documentation. The list isn't complete as the possibilities are limitless.
 
-The source for this documentation is available in the `docs directory <https://github.com/radareorg/cutter/tree/master/docs>`_ on Cutter's repository. When the docs are updated, they are generated and pushed directly to the website at <https://cutter.re/docs>. The source for the website and blog are available on the `cutter.re's repository <https://github.com/radareorg/cutter.re>`_ and are served from the ``gh-pages`` branch.
-
+The source for this documentation is available in the `docs directory <https://github.com/radareorg/cutter/tree/master/docs>`_ on Cutter's repository. This source can be generated according to the steps described in the :ref:`building docs page<contributing/docs/building-docs:Building docs>`. When the docs are updated, they are generated and pushed directly to the website at <https://cutter.re/docs>. The source for the website and blog are available on the `cutter.re's repository <https://github.com/radareorg/cutter.re>`_ and are served from the ``gh-pages`` branch.
 
 .. tip::
   Document what you wished to see. If you are a user of Cutter, try to think what things you would want to see documented when you started using the project. Sometimes, the best contributions are coming from your own needs.