Add docs about env vars

docs/content/developers/release-management.md

@@ -28,9 +28,10 @@ These are normally configured in the repository environment variables.
 * `AUR_EDGE_GIT_URL`: The Git URL for AUR edge (normally `ddev-edge-bin`), for example `ssh://[email protected]/ddev-edge-bin.git`.
 * `AUR_PACKAGE_NAME`: The base name of the AUR package. Normally `ddev` for production, but `ddev-test` for testing repository.
 * `AUR_STABLE_GIT_URL`: The Git URL for AUR stable (normally `ddev-bin`), for example `ssh://[email protected]/ddev-bin.git`.
-* `DOCKERHUB_USERNAME`: Username for pushing to `hub.docker.com` or updating image descriptions.
-* `DOCKER_ORG`: the `hub.docker.org` organization to push to
-* `FURY_ACCOUNT`: [Gemfury](https://gemfury.com) account that receives package pushes.
+* `DDEV_WINDOWS_SIGN`: If the value is `"true"` then `make` will attempt to sign the Windows executables, which requires building on our self-hosted Windows runner.
+* `DOCKER_ORG`: the organization on `hub.docker.org` to push to. Currently `ddev` on `ddev/ddev` and `ddevhq` on `ddev-test/ddev`.
+* `DOCKERHUB_USERNAME`: Username for pushing to `hub.docker.com` or updating image descriptions. Usually `ddevmachinepush`.
+* `FURY_ACCOUNT`: [Gemfury](https://gemfury.com) account that receives package pushes. `drud` on `ddev/ddev` for historical reasons, and `rfay` on `ddev-test/ddev` because that's a spare account there.
 * `HOMEBREW_EDGE_REPOSITORY`: Like `ddev/homebrew-ddev-edge` but might be another repository like be `ddev-test/homebrew-ddev-edge`.
 * `HOMEBREW_STABLE_REPOSITORY`: Like `ddev/homebrew-ddev` but might be another repository like `ddev-test/homebrew-ddev`.