Add link to contributor guide, add citation

Author: PhilReedData

TeSS_docs/developers/code-data.md

@@ -12,7 +12,8 @@ TeSS is committed to the FAIR principles: making data findable, accessible, inte
 {octicon}`mark-github` **Software**
 ^^^
 
-The source code for TeSS [is available on GitHub](https://github.com/ElixirTeSS/TeSS), under the [BSD 3-Clause](https://tess.elixir-europe.org/about/developers#api:~:text=available%20under%20the-,BSD%203%2DClause,-license.) license.
+The source code for TeSS [is available on GitHub](https://github.com/ElixirTeSS/TeSS), under the [BSD 3-Clause](https://tess.elixir-europe.org/about/developers#api:~:text=available%20under%20the-,BSD%203%2DClause,-license.) license. 
+We welcome [contributions](https://github.com/ElixirTeSS/TeSS/blob/master/CONTRIBUTING.md).
 :::
 
 

TeSS_docs/developers/credit.md

@@ -1,7 +1,7 @@
 # How to credit TeSS when you make your own instance
 
 You are welcome to use the TeSS platform software however you like within the terms of its licence. 
-However, we have an extensive community of users and developers which you are welcome to join. They can offer you support and guidance throughout the setup process and thereafter.
+However, we have an extensive community of users and developers which you are welcome to join. They can offer you support and guidance throughout the setup process and thereafter. We also welcome [contributions](https://github.com/ElixirTeSS/TeSS/blob/master/CONTRIBUTING.md).
 
 If you are maintaining an instance of TeSS, or thinking of doing so, please [contact us](https://tess.elixir-europe.org/about/us#contact). We will help you to effectively credit the TeSS developers and community.
 
@@ -11,4 +11,8 @@ The TeSS team would like to acknowledge the help of a number of groups and indiv
 
 - ELIXIR technical staff and coordinators from the Hub, in particular Rafael Jimenez, Martin Cook and Premysl Velek
 - The ELIXIR Training Coordinators group, particularly Celia van Gelder, Patricia Palagi and Gabriella Rustici
-- The UK structural bioinformatics group, particularly Christine Orengo
+- The UK structural bioinformatics group, particularly Christine Orengo
+
+## Cite us
+
+> Niall Beard, Finn Bacall, Aleksandra Nenadic, Milo Thurston, Carole A Goble, Susanna-Assunta Sansone, Teresa K Attwood, TeSS: a platform for discovering life-science training opportunities, Bioinformatics, Volume 36, Issue 10, 15 May 2020, Pages 3290-3291, https://doi.org/10.1093/bioinformatics/btaa047