fix(@cubejs-backend/server-core): Support apiSecret as option (#1130)

Author: ovr

packages/cubejs-server-core/core/index.test.js

@@ -75,6 +75,7 @@ describe('index.test', () => {
       initApp: () => {},
       processSubscriptionsInterval: 5000,
       devServer: false,
+      apiSecret: 'randomstring',
       logger: () => {},
       driverFactory: () => {},
       externalDriverFactory: () => {},

packages/cubejs-server-core/core/optionsValidate.js

@@ -23,6 +23,7 @@ const schemaOptions = Joi.object().keys({
   basePath: Joi.string(),
   webSocketsBasePath: Joi.string(),
   devServer: Joi.boolean(),
+  apiSecret: Joi.string(),
   webSockets: Joi.boolean(),
   processSubscriptionsInterval: Joi.number(),
   initApp: Joi.func(),