add dex local oidc compose

docker-compose.yml

@@ -47,6 +47,7 @@ services:
       # OpenID Connect
       # --------------
       # Works with any OIDC provider
+      # OIDC_BUTTON_LABEL: FedID
       # OIDC_CLIENT_ID: 
       # OIDC_CLIENT_SECRET: 
       # OIDC_ISSUER: https://fedid-test.jlinc.io/oidc