docs: license and contributing [skip ci]

Author: enisdenjo

Diff for: CONTRIBUTING.md

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Denis Badurina
+Copyright (c) GraphQL Contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Diff for: LICENSE.md

@@ -744,6 +744,14 @@ Check the [docs folder](docs/) out for [TypeDoc](https://typedoc.org) generated
 
 Inspect audits of other implementations in the [implementations folder](implementations/). Adding your implementation is very welcome!
 
-## [Want to help?](CONTRIBUTING.md)
+## Want to help?
 
-File a bug, contribute with code, or improve documentation? Read up on our guidelines for [contributing](CONTRIBUTING.md) and drive development with `yarn test --watch` away!
+File a bug, contribute with code, or improve documentation? Read up on our guidelines below and drive development with `yarn test --watch` away!
+
+This repository is managed by EasyCLA. Project participants must sign the free [GraphQL Specification Membership agreement](https://preview-spec-membership.graphql.org) before making a contribution. You only need to do this one time, and it can be signed by [individual contributors](http://individual-spec-membership.graphql.org/) or their [employers](http://corporate-spec-membership.graphql.org/).
+
+To initiate the signature process please open a PR against this repo. The EasyCLA bot will block the merge if we still need a membership agreement from you.
+
+You can find [detailed information here](https://github.com/graphql/graphql-wg/tree/main/membership). If you have issues, please email [[email protected]](mailto:[email protected]).
+
+If your company benefits from GraphQL and you would like to provide essential financial support for the systems and people that power our community, please also consider membership in the [GraphQL Foundation](https://foundation.graphql.org/join).