added contributions community template

Signed-off-by: Nir Rozenbaum <nirro@il.ibm.com>

CONTRIBUTING.md

@@ -0,0 +1,43 @@
+**Table of Contents**
+
+- [Contributing guidelines](#contributing-guidelines)
+    - [Terms](#terms)
+    - [Certificate of Origin](#certificate-of-origin)
+    - [DCO Sign Off](#dco-sign-off)
+    - [Code of Conduct](#code-of-conduct)
+    - [Contributing a patch](#contributing-a-patch)
+    - [Issue and pull request management](#issue-and-pull-request-management)
+
+# Contributing guidelines
+
+## Terms
+
+All contributions to the repository must be submitted under the terms of the [Apache Public License 2.0](https://www.apache.org/licenses/LICENSE-2.0).
+
+## Certificate of Origin
+
+By contributing to this project, you agree to the Developer Certificate of Origin (DCO). This document was created by the Linux Kernel community and is a simple statement that you, as a contributor, have the legal right to make the contribution. See the [DCO](https://github.com/open-cluster-management/community/blob/main/DCO) file for details.
+
+## DCO Sign Off
+
+You must sign off your commit to state that you certify the [DCO](https://github.com/open-cluster-management/community/blob/main/DCO). To certify your commit for DCO, add a line like the following at the end of your commit message:
+
+```
+Signed-off-by: John Smith <john@example.com>
+```
+
+This can be done with the `--signoff` option to `git commit`. See the [Git documentation](https://git-scm.com/docs/git-commit#Documentation/git-commit.txt--s) for details.
+
+## Code of Conduct
+
+The Open Cluster Management project has adopted the CNCF Code of Conduct. Refer to our [Community Code of Conduct](https://github.com/open-cluster-management/community/blob/main/CODE_OF_CONDUCT.md) for details.
+
+## Contributing a patch
+
+1.  Submit an issue describing your proposed change to the repository in question. The repository owners will respond to your issue promptly.
+1.  Fork the desired repository, then develop and test your code changes.
+1.  Submit a pull request.
+
+## Issue and pull request management
+
+Anyone can comment on issues and submit reviews for pull requests. In order to be assigned an issue or pull request, you can leave a `/assign <your Github ID>` comment on the issue or pull request (PR).

README.md

@@ -7,7 +7,9 @@
 
 The spec transport bridge component of [Hub-of-Hubs](https://github.com/open-cluster-management/hub-of-hubs).
 
-## How it works
+Go to the [Contributing guide](CONTRIBUTING.md) to learn how to get involved.
+
+## Getting Started
 
 ## Build and push the image to docker registry