Added contribuitor guide page

edit_documentation_here/source/contributor_guide/contributor.md

@@ -0,0 +1,31 @@
+# Contributor Guide
+<br/>
+
+There are several ways to contribute to InVesalius, but we highlight two: contributing with source code and/or translating the software into other languages.
+
+## Contributing to code
+
+1. Fork [InVesalius](https://github.com/invesalius/invesalius3) at GitHub (https://help.github.com/articles/fork-a-repo).
+
+2. Create a branch for the desired feature you are going to develop, since we work with branches.
+
+3. Pull Request (https://help.github.com/articles/using-pull-requests).
+
+Please, write source code comments and commit messages in English. And follow the [PEP 8 coding style](http://www.python.org/dev/peps/pep-0008/).
+
+See in [this link the instructions](https://invesalius.github.io/docs/installation_guide/installation_guide.html) to install InVesalius and its dependencies.
+
+## Contributing to translation
+
+InVesalius is under constant development, which makes it a challenge for translation into multiple languages.
+
+You can help us both: improving existing translations, or translating InVesalius to new languages. We are currently using [Transifex](https://www.transifex.com/), an open web service that help the translator's job.
+
+Using Transifex to translate InVesalius
+
+1. Register for a [Transifex account](https://www.transifex.com/signup).
+2. See your e-mail inbox and validate your account.
+3. Access [InVesalius translation website](https://www.transifex.com/projects/p/invesalius3/).
+4. **Request language** if the language you will translate is not on the available translations. Or Select one of available translations, click the link **gui - po/en.po** then click the button **Translate now**.
+5. Wait for the translation permission.
+6. Do not forget to press save while you translate – and after you have finished.

edit_documentation_here/source/index.rst

@@ -16,6 +16,7 @@ InVesalius documentation
    About <abstract/abstract.md>
    Developer Installation <installation_guide/installation_guide.md>
    User Manual <user_guide/user_guide.md>
+   Contributor Guide <contributor_guide/contributor.md>
 
 .. grid::
 
@@ -40,6 +41,8 @@ InVesalius documentation
       Find more about installing the developer version
       of the software.
 
+.. grid::
+
    .. grid-item-card:: User manual
       :link: user_guide/user_guide.html
       :text-align: left
@@ -51,6 +54,17 @@ InVesalius documentation
       Find more about the installation process and
       using the software.
 
+   .. grid-item-card:: Contributor guide 
+      :link: contributor_guide/contributor.html
+      :text-align: left
+      :img-background: _static/images/invesalius_card_3.jpg
+      :class-title: sd-fs-5
+      :class-card: sd-animate-slide-from-left rounded-3
+      :class-body: custom
+
+      Find how you can contribute to InVesalius.
+
+
 .. Indices and tables
 .. ==================