workaround

src/handler.js

@@ -1,30 +1,57 @@
 // Apollo
 import { ApolloServer } from '@apollo/server';
 import { ApolloServerPluginLandingPageLocalDefault } from '@apollo/server/plugin/landingPage/default';
+import { ApolloServerPluginDrainHttpServer } from '@apollo/server/plugin/drainHttpServer';
 import {
   startServerAndCreateLambdaHandler,
   handlers,
 } from '@as-integrations/aws-lambda';
 // Prisma
 import { prisma } from './prisma/database.js';
+import { expressMiddleware } from '@apollo/server/express4';
 import cors from 'cors';
+import express from 'express';
+import http from 'http';
 // Type definitions and resolvers
 import typeDefs from './Type_Definitions/_typeDefs.js';
 import resolvers from './resolvers/resolvers.js';
 import { loggingPlugin } from './logging.js';
+// Websocket
+import { WebSocketServer } from 'ws';
+import { useServer } from 'graphql-ws/lib/use/ws';
+import { makeExecutableSchema } from '@graphql-tools/schema';
+
+const app = express();
+const httpServer = http.createServer(app);
+
+// Creating the WebSocket server
+const wsServer = new WebSocketServer({
+  server: httpServer,
+  path: '/',
+});
+
+const schema = makeExecutableSchema({ typeDefs, resolvers });
+const serverCleanup = useServer({ schema }, wsServer);
 
 const server = new ApolloServer({
-  typeDefs,
-  resolvers,
-  csrfPrevention: true,
-  cache: 'bounded',
+  schema,
   context: () => {
     return { prisma };
   },
   introspection: true,
   plugins: [
     ApolloServerPluginLandingPageLocalDefault({ embed: true }),
     ...(parseInt(process.env.IS_LOGGING) ? [loggingPlugin] : []),
+    ApolloServerPluginDrainHttpServer({ httpServer }),
+    {
+      async serverWillStart() {
+        return {
+          async drainServer() {
+            await serverCleanup.dispose();
+          },
+        };
+      },
+    },
   ],
   logger: console,
 });
@@ -38,5 +65,9 @@ export const handler = startServerAndCreateLambdaHandler(
         console.log('###? received event=' + JSON.stringify(event));
       },
     ],
+    cors: {
+      origin: '*',
+      credentials: true,
+    },
   },
 );