Update CONTRIBUTING.md

Author: martafullen

CONTRIBUTING.md

@@ -2,32 +2,35 @@
 
 Welcome to the Eclipse AASX Package Explorer repository. 
 
-If you are joining the project from the previous repository at admin-shell-io/aasx-package-explorer, please see the [Migrating](#migrating) section below to get started in the new repository.
+If you are joining the project from the previous repository at admin-shell-io/aasx-package-explorer, please see the [Joining Development](#joining-development) section below to get started in the new repository.
 
 The [Contribution guildelines](#contribution-guidelines) section includes general guidelines as well as additional quirks specific to Eclipse Foundation projects, so it is definitely worth a read as well.
 
 ## Joining Development
 
 AASX Package Explorer is an Eclipse Foundation incubated project and therefore needs to adhere to Eclipse Foundation rules.
-This introduces a slight overhead for every contributor, at least at the very begginning, but it's worth it!
-
-Here are the steps to begin contributing to the Eclipse AASX Package Explorer (and any other project under the Eclipse Foundation umbrella):
-
-1. create an account at the Eclipse Foundation website
-    - make sure to add your github name
-1. become a Contributor to Eclipse AASX Package Explorer
-1. pull request
-1. happily develop ever after
-
-      or...
-
-4. contact a Project Lead or a Committer to be nominated to a Committer yourself (and receive more repository priviledges, such as ability to merge)
-
+This introduces a slight overhead for every contributor, at least at the very beginning, but it's worth it!
+
+Here are the steps to become a Contributor in Eclipse AASX Package Explorer (and any other project under the Eclipse Foundation umbrella):
+
+1. Create an Eclipse Foundation Account at https://accounts.eclipse.org/ 
+1. Log in to your Eclipse account and digitally sign the [Eclipse Contributor Agreement](https://www.eclipse.org/projects/handbook/#contributing-eca);
+1. Make sure to add your github name (`Edit my account` > `Social Media Links` > `GitHub Username`)
+1. Fork the repository and create an initial commit
+    - if you have preexisting work that you'd like to include, see TBD
+    - ensure that the author credentials on the commit record match the email address and/or GitHub username associated with the Eclipse Foundation Account
+1. Create a pull request and work with the project team to merge the contribution
+1. Happily develop ever after!
+    - or contact a Project Lead or a Committer to be nominated to a Committer yourself (and receive more repository priviledges, such as the ability to merge)
+
+For more details see ["Contributing" in Eclipse Foundation Handbook](https://www.eclipse.org/projects/handbook/#contributing-contributors).
+   
 ## General development guidelines
 
 tbd:
 
 - disabled projects
+- dependencies
 - pipelining/admin/configuration
 - releases