feat: Create empty trigger step when the flow is created

packages/backend/src/graphql/mutations/create-flow.ts

@@ -1,4 +1,5 @@
 import Flow from '../../models/flow';
+import Step from '../../models/step';
 import flowType from '../types/flow';
 import RequestWithCurrentUser from '../../types/express/request-with-current-user';
 
@@ -7,6 +8,11 @@ const createFlowResolver = async (req: RequestWithCurrentUser) => {
     userId: req.currentUser.id
   });
 
+  await Step.query().insert({
+    flowId: flow.id,
+    type: 'trigger'
+  })
+
   return flow;
 }