EMO release review: Add a README

README.md

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+# Jakarta WebSocket
+
+This repository contains the source for:
+
+ - the Jakarta WebSocket [API](https://jakarta.ee/specifications/websocket/2.0/apidocs) (/api) - 
+ - the Jakarta WebSocket [specification](https://jakarta.ee/specifications/websocket/2.0/websocket-spec-2.0.html) (/spec)
+
+
+## Building
+
+### API
+
+Jakarta WebSocket API can be built by executing the following from the project root:
+
+```
+cd api
+mvn clean package
+```
+The API jars can then be found in `/api/client/target` and `/api/server/target`.
+
+### Specification
+
+Jakarta Expression Language specification can be built by executing the following from the project root:
+
+```
+cd spec
+mvn clean package
+```
+The zip archive containing the specification in PDF and HTML format can then be found in `/spec/target`.
+
+
+## Making Changes
+
+To make changes, fork this repository, make your changes, and submit a pull request.
+
+
+## About Jakarta WebSocket
+
+Jakarta WebSocket defines defines a set of Java APIs for the development of WebSocket applications.