Fix keycloak proxy error.
Fix keycloak proxy error.

Without this setting, logging into keycloak admin via
localhost:2015/auth would succeed and then the authorization
would get cleared out. Seems related to
https://issues.jboss.org/browse/KEYCLOAK-4717
Setting the proxy variable fixes it.
https://stackoverflow.com/questions/44624844/configure-reverse-proxy-for-keycloak-docker-with-custom-base-url

Signed-off-by: Elliot Murphy <014ce8fab4ab9f8a957bfe9f974379093994de97@users.noreply.github.com>

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