Add contribution documentation

This commit adds CONTRIBUTING.md to inform contributors of
important contribution policies, legal documents, agreements
and guidelines.

Signed-off-by: Hoang Thuan Pham <hoang.pham@calian.ca>

CONTRIBUTING.md

@@ -0,0 +1,54 @@
+# Contributing to Eclipse CDT Cloud Time Graph
+
+Thanks for your interest in the [Eclipse CDT Cloud Time Graph][timegraph]!
+The following is a set of guidelines for contributing to the project.
+
+## How to Contribute
+
+In order to contribute, please first [open an issue][issues] that clearly describes the bug you
+intend to fix or the feature you would like to add. Make sure you provide a way to reproduce
+the bug or test the proposed feature.
+
+Once you have your code ready for review, please open a [pull request][pr].
+
+A committer will then review your contribution and help to get it merged.
+
+## Code of Conduct
+
+This project is governed by the [Eclipse Community Code of Conduct][conduct].
+By participating, you are expected to uphold this code.
+
+## Eclipse Development Process
+
+This Eclipse Foundation open project is governed by the [Eclipse Foundation
+Development Process][dev-process] and operates under the terms of the [Eclipse IP Policy][ip-policy].
+
+## Eclipse Contributor Agreement
+
+In order to be able to contribute to Eclipse Foundation projects you must
+electronically sign the [Eclipse Contributor Agreement (ECA)][eca].
+
+The ECA provides the Eclipse Foundation with a permanent record that you agree
+that each of your contributions will comply with the commitments documented in
+the Developer Certificate of Origin (DCO). Having an ECA on file associated with
+the email address matching the "Author" field of your contribution's Git commits
+fulfills the DCO's requirement that you sign-off on your contributions.
+
+For more information, please see the [Eclipse Committer Handbook][handbook].
+
+## Contact
+
+For questions related to the Time Graph, please open a GitHub [issue tracker][issues].
+
+The Time Graph is part of `eclipse-cdt-cloud`. If you have any questions regarding CDT Cloud,
+please refer to the contact options listed on the [CDT.Cloud website][cdt].
+
+[cdt]: https://cdt-cloud.io/contact/
+[conduct]: https://github.com/eclipse/.github/blob/master/CODE_OF_CONDUCT.md
+[dev-process]: https://eclipse.org/projects/dev_process
+[eca]: https://www.eclipse.org/legal/ECA.php
+[handbook]: https://www.eclipse.org/projects/handbook/#resources-commit
+[ip-policy]: https://www.eclipse.org/org/documents/Eclipse_IP_Policy.pdf
+[issues]: https://github.com/eclipse-cdt-cloud/timeline-chart/issues
+[pr]: https://github.com/eclipse-cdt-cloud/timeline-chart/pulls
+[timegraph]: https://github.com/eclipse-cdt-cloud/timeline-chart

README.md

@@ -1,38 +1,45 @@
-[![Gitpod - Code Now](https://img.shields.io/badge/Gitpod-code%20now-blue.svg?longCache=true)](https://gitpod.io#https://github.com/theia-ide/timeline-chart)
-[![Build Status](https://github.com/theia-ide/timeline-chart/workflows/CI-CD/badge.svg?branch=master)](https://github.com/theia-ide/timeline-chart/actions?query=branch%3Amaster)
 # Time Graph
+
+[![Gitpod - Code Now][gitpod-icon-small]][gitpod-link]
+[![Build Status][build-status-icon]][build-status-link]
+
 A time graph / gantt chart library for large data (e.g. traces)
 
 To build, from the root type `yarn`
 
 To test an application type `yarn start` then open localhost:8080 on your web browser
 
-[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/theia-ide/timeline-chart)
+[![Open in Gitpod][gitpod-icon-large]][gitpod-link]
+
+**👋 Want to help?** Read our [contributor guide][contributing].
 
-# Documentation
-For detailed description of the timeline chart library and it's components see [here](https://github.com/theia-ide/timeline-chart/blob/master/doc/documentation.md).
+## Documentation
 
-# Screenshots
+For detailed description of the timeline chart library and it's components see [here][documentation].
 
-![timeline-chart](https://raw.githubusercontent.com/theia-ide/timeline-chart/master/doc/images/screenshot1-0.0.1.png)
-![timeline-chart](https://raw.githubusercontent.com/theia-ide/timeline-chart/master/doc/images/screenshot2-0.0.1.png)
+## Screenshots
+
+![timeline-chart][screenshot-1]
+![timeline-chart][screenshot-2]
+
+## Applications
 
-# Applications
 The following list of applications are currently making use of the timeline-chart library;
-* [Theia Trace Extension](https://github.com/theia-ide/theia-trace-extension)
-* [Example Timeline Application](https://github.com/theia-ide/theia-timeline-extension)
 
-# Tests
+* [Theia Trace Extension][trace-extension]
+* [Example Timeline Application][sample-app]
+
+## Tests
 
 Tests can be executed from the root of the project with:
 
-```
+```shell
 yarn test
 ```
 
 Or from `./timeline-chart`, where the tests outputs are formatted in a more readable way:
 
-```
+```shell
 cd timeline-chart
 yarn test --verbose --watch
 ```
@@ -44,3 +51,15 @@ The following command prints a coverage report to the terminal. As of now it cov
 ```shell
 yarn test --coverage --collectCoverageFrom='src/**/*.ts'
 ```
+
+[build-status-icon]: https://github.com/theia-ide/timeline-chart/workflows/CI-CD/badge.svg?branch=master
+[build-status-link]: https://github.com/theia-ide/timeline-chart/actions?query=branch%3Amaster
+[contributing]: CONTRIBUTING.md
+[documentation]: https://github.com/theia-ide/timeline-chart/blob/master/doc/documentation.md
+[gitpod-icon-large]: https://gitpod.io/button/open-in-gitpod.svg
+[gitpod-icon-small]: https://img.shields.io/badge/Gitpod-code%20now-blue.svg?longCache=true
+[gitpod-link]: https://gitpod.io#https://github.com/theia-ide/timeline-chart
+[sample-app]: https://github.com/theia-ide/theia-timeline-extension
+[screenshot-1]: https://raw.githubusercontent.com/theia-ide/timeline-chart/master/doc/images/screenshot1-0.0.1.png
+[screenshot-2]: https://raw.githubusercontent.com/theia-ide/timeline-chart/master/doc/images/screenshot2-0.0.1.png
+[trace-extension]: https://github.com/eclipse-cdt-cloud/theia-trace-extension