Add instructions for GitHub Actions

.github/workflows/tests.yml

@@ -0,0 +1,5 @@
+name: Run Tests
+
+on:
+
+jobs:

README.md

@@ -90,3 +90,23 @@ for you).
 
 Just for clarification, an item can never have its `Quality` increase above `50`, however __"Sulfuras"__ is a
 legendary item and as such its `Quality` is `80` and it never alters.
+
+# Continuous Integration
+
+Now that we've improved the codebase through a thorough refactor, and we've added some much-needed tests, it's time 
+to think about taking advantage of those.
+
+We'd like to only be able to merge code if the test suite passes, otherwise the PR should fail. This way we're never adding
+breaking changes. To do that, we're going to create a GitHub action to run the tests on Pull Request.
+
+Start by looking in the [test.yml](.github/workflows/tests.yml) file.
+
+1. Set the trigger to be when someone opens a PR against the `main` branch
+2. Create a `test` job that runs on ubuntu
+3. Firstly, we'd need to get the code - Hint: what are we doing when changing out a branch
+4. Secondly, we'd need to make sure the environment is set - Hint: we're using Node
+5. After we make sure we have the code and the environment set, we should install all dependencies and then run the tests.
+
+
+Stretch goal: Sometimes we're too lazy to check the status each time. It might be easier to receive an email. What should 
+we do to make sure we're receiving an email whenever a build passes or fails?