Added contributing guidelines

Author: Uma-95

src/user/contributing.rst

@@ -48,6 +48,19 @@ We are glad to know that you would like to contribute to the ``conda-forge`` doc
    your changes.
 5. Submit a `pull request
    <https://help.github.com/articles/about-pull-requests/>`_ to the main repository proposing your changes.
+   
+   Writing guidelines:
+   
+Some basic writing guidelines should be kept in mind before you start contributing:
 
+1. Identify your audience and understand their skill level.
+2. Match the technical language with the audience's skill level proficiency.
+3. Try to keep it simple. In case you have to use a lot of complicated terms, provide a glossary of key terms.
+4. Address the audience directly as the user(s).
+5. While mentioning an action, use the “command” form of the verb: “Choose an option from the menu and press Enter.”   
+6. For references, provide links to related content. 
+7. Use headings and bullet points,which makes it easier to read.
+8. Avoid ambiguous titles. The title should include a clear description of the page's subject.
+9. Check your spellings and grammar.
 Happy contributing!