docs: add contributing guide

CONTRIBUTING.md

@@ -0,0 +1,38 @@
+## Contributing
+
+Thanks for wanting to contribute to Taskcafe!
+
+### Where do I go from here?
+
+If you have noticed a bug or have a feature request, make one! If best to get confirmation
+of your bug or feature before starting work on a pull request.
+
+### Fork & create a branch
+
+If there is something you want to fix or add, the first step is to fork this repository.
+
+Next is to create a new branch with an appropriate name. The general format that should be used is
+
+```
+git checkout -b '<type>/<description>'
+```
+
+The `type` is the same as the `type` that you will use for [your commit message](https://www.conventionalcommits.org/en/v1.0.0/#summary).
+
+The `description` is a decriptive summary of the change the PR will make.
+
+### General Rules
+
+- All PRs should be rebased (with master) and commits squashed prior to the final merge process
+
+### Git Commit Message Style
+
+This project uses the [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/#summary) format.
+
+Example commit messages:
+
+```
+chore: update gqlgen dependency to v2.6.0
+docs(README): add new contributing section
+fix: remove debug log statements
+```