Create Code of Conduct for the Resources List.

Add a code of conduct for the student resources list.

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+Freeside is overseen by the [University of Hull](https://www.hull.ac.uk) and we will abide by University policy and UK Law where applicable.
+
+## Our Guidelines
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* Submitting malicious or poor quality pull requests.
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment (joking is ok)
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+  
+  ## Contacting us
+  
+  If you would like to contact Freeside to discuss conduct or a PR, please join our Discord: https://discord.gg/BQ9E7S37qd.