Merge pull request #17 from iteam-consulting/documentation

docs: contributing

docs/CONTRIBUTING.md

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+# Contributing
+
+Thank you for taking the time to contribute to this project! :tada:
+
+## Commits
+
+We loosely follow the Google commit guidelines found in several projects like [angular](https://github.com/angular/angular).
+
+Please use this template for commit messages:
+
+`action(feature): message`
+
+Where action is one of the following:
+
+- **feat**: adding a new feature
+- **fix**: fixing a bug
+- **build**: modifying local or ci building
+- **style**: changing code style via new linting rules.
+- **chore**: updating packages, refactoring existing code. This serves as an escape hatch when your changes do not fit into the other actions.
+
+The feature should point to some aspect of the codebase. The message should be a concise, descriptive and use imperative present tense.
+
+### Sample commit messages
+
+`feat(drives): add support for drives`
+
+`fix(lists): convert title case to camel in content type`
+
+`build(cypress): upload e2e videos to review system`
+
+## Pull Requests
+
+All code contributions are added via Pull Request. If you are working on an issue, please create a branch in your fork with a sensible name. You can create a PR immediately and mark it as [Draft](https://github.blog/2019-02-14-introducing-draft-pull-requests/). Once your changes are complete, you should mark your PR as ready for review.
+
+We operate with a `master <- feature` branch pattern.
+
+## Testing
+
+This project has 2 testing layers: unit and e2e. We use [jest](https://jestjs.io/) for unit testing and [cypress](https://www.cypress.io/) for e2e testing. If you want to help us fix bugs or add new features, please make sure you include unit (and if necessary, e2e) testing with your code contributions.
+
+## Useful Docs
+
+- [Microsoft Graph](https://docs.microsoft.com/en-us/graph/)
+- [msgraph-sdk-javascript](https://github.com/microsoftgraph/msgraph-sdk-javascript/tree/dev/docs)
+- [Gatsby](https://www.gatsbyjs.org/docs/)