Add root endpoint update back to repo

With https://foundation.eclipse.org/r/c/puppet/modules/+/5485, the proxy headers needed to properly rewrite https URLs has been introduced into production. This has been nominally tested on staging as working, so we should be safe to deploy these changes once more.

requested review from @zacharysabourin, @cguindon, and @epoirier

LGTM

If you want to test this locally:

1. Make sure that the secrets have been created under config/application/secret.properties
2. Run sh ./config/dev-ssl-cert.sh. This will generate the needed certs for the nginx container.
3. Add an alias to your hosts file for wg.eclipse.dev.docker to localhost
4. Run make compile-start which will start your instance.
5. In browser, test https://wg.eclipse.dev.docker/working-groups and observer redirect. In network tab, should show as redirecting to https://wg.eclipse.dev.docker/working-groups/, with no HTTP redirect in the chain.

mentioned in commit 86ddae44

merged