Update CONTRIBUTING.md

CONTRIBUTING.md

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-# Contributing
+# Contributing to temurin-build
 
+Thanks for your interest in this project.
 You can contribute to this project in many different ways.  **We appreciate all kinds of help, so thank you!**
 
+## Project description
+
+temurin-build is a project that contains the shell build scripts to produce Temurin binaries
+
+* https://github.com/adoptium/temurin-build
+
+## Developer resources
+
+The project maintains the following source code repositories
+
+* https://github.com/adoptium/temurin-build
+
+## Eclipse Contributor Agreement
+
+Before your contribution can be accepted by the project team contributors must
+electronically sign the Eclipse Contributor Agreement (ECA).
+
+* http://www.eclipse.org/legal/ECA.php
+
+Commits that are provided by non-committers must have a Signed-off-by field in
+the footer indicating that the author is aware of the terms by which the
+contribution has been provided to the project. The non-committer must
+additionally have an Eclipse Foundation account and must have a signed Eclipse
+Contributor Agreement (ECA) on file.
+
+For more information, please see the Eclipse Committer Handbook:
+https://www.eclipse.org/projects/handbook/#resources-commit
+
+## Contact
+
+Contact the Eclipse Foundation Webdev team via [email protected].
+
 ## Issues and Enhancements
 
 Please let us know via our [issue tracker](https://github.com/AdoptOpenJDK/openjdk-build/issues) if you find a problem, even if you don't have a fix for it.  The ideal issue report should be descriptive, and where possible include the steps we can take to reproduce the problem for ourselves.