fix: /config answers the OpenID Provider's state and issuer.

debian-package/src/usr/lib/vpn-router/vpnrouter_web/status.py

@@ -211,9 +211,11 @@ def postgresql_databases():
 
 def details(state):
     """What /config shows: the configuration without its secrets, and what the router resolved and runs; caddy is the
-    installed Caddy, {version, source, service}, service the state of caddy.service, null when it is not installed."""
+    installed Caddy, {version, source, service}, service the state of caddy.service, null when it is not installed; oidc
+    is {enabled, issuer} of the OpenID Provider, issuer null while it is disabled."""
     configuration = state.get('configuration', {})
     caddy = package_version('caddy')
+    oidc = configuration.get('oidc', {}).get('enabled') is True
     return {
         'configuration': configuration,
         'network': dict(state.get('network', {}), routes=routes()),
@@ -230,6 +232,7 @@ def details(state):
         # Caddy is upstream's once its repository is configured (vpn-router-caddy).
         'caddy': {'version': caddy, 'source': 'upstream' if vpnrouter.CADDY_APT_SOURCE.is_file() else 'ubuntu',
                   'service': unit_state('caddy.service')} if caddy else None,
+        'oidc': {'enabled': oidc, 'issuer': vpnrouter.oidc_issuer(configuration) if oidc else None},
     }