chore: added docker files for bringing the container up

packages/hoppscotch-backend/src/app.module.ts

@@ -1,10 +1,51 @@
 import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
+import { GraphQLModule } from '@nestjs/graphql';
+import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
+import { AppResolver } from './app.resolver';
 
 @Module({
-  imports: [],
+  imports: [
+    GraphQLModule.forRoot<ApolloDriverConfig>({
+      playground: process.env.PRODUCTION !== 'true',
+      debug: process.env.PRODUCTION !== 'true',
+      autoSchemaFile: true,
+      installSubscriptionHandlers: true,
+      subscriptions: {
+        'subscriptions-transport-ws': {
+          path: '/graphql',
+          onConnect: (connectionParams: any) => {
+            return {
+              reqHeaders: Object.fromEntries(
+                Object.entries(connectionParams).map(([k, v]) => [
+                  k.toLowerCase(),
+                  v,
+                ]),
+              ),
+            };
+          },
+        },
+      },
+      context: async ({ req, connection }) => {
+        if (req) {
+          return { reqHeaders: req.headers };
+        } else {
+          return {
+            // Lowercase the keys
+            reqHeaders: Object.fromEntries(
+              Object.entries(connection.context).map(([k, v]) => [
+                k.toLowerCase(),
+                v,
+              ]),
+            ),
+          };
+        }
+      },
+      driver: ApolloDriver,
+    }),
+  ],
   controllers: [AppController],
-  providers: [AppService],
+  providers: [AppService, AppResolver],
 })
 export class AppModule {}