docs: create a release doc

Outlining release steps

Author: vikerman

docs/process/release.md

@@ -0,0 +1,36 @@
+# Release Steps
+- Login as `angular` npm account
+- Update the version in `package.json` - [Example Commit](https://github.com/angular/universal/commit/fccca4b49f198fb9b6a52877db58909ebb419369)
+- Create a release commit
+```sh
+git commit -a -m "release: v9.0.0-next.13"  # (Update to version just put in package.json)
+```
+- Create a tag
+```sh
+git tag -v v9.0.0-next.13
+```
+- Push commit and tag
+```sh
+git push upstream && git push upstream --tags
+```
+- Publish
+```sh
+# For release with 'next' tag
+./publish-next.sh
+```
+
+```sh
+# For release with 'latest' tag
+./publish.sh
+```
+
+# Release Changelog
+(TODO: Borrow the changelog from Angular CLI project. For now use these simple instructions)
+- Get commits between the two releases
+```sh
+git log v9.0.0-next.12..v9.0.0-next.13 | xclip -selection clipboard
+```
+- Go to the `Releases` tab in the repository
+- Click on the newly created tag (9.0.0-next.13 in this case)
+- Paste the contents of clipboard to the contents
+- Choose `This is a prerelase` checkbox for pre-release versions