feat: implement Keycloak SSO integration with JIT provisioning and Next.js login button

docker-compose.yml

@@ -15,6 +15,11 @@ services:
       CORS_ORIGIN: ${CORS_ORIGIN:-https://michess.mischlabs.de}
       ADMIN_EMAIL: ${ADMIN_EMAIL:-}
       APP_DIR: /opt/michess
+      SSO_AUTHORITY: ${SSO_AUTHORITY:-}
+      SSO_CLIENT_ID: ${SSO_CLIENT_ID:-}
+      SSO_CLIENT_SECRET: ${SSO_CLIENT_SECRET:-}
+      SSO_REDIRECT_URI: ${SSO_REDIRECT_URI:-}
+      APP_URL: ${APP_URL:-}
     ports:
       - "${MICHESS_PORT:-3000}:3000"
       - "${MICHESS_API_PORT:-3001}:3001"