Add GraphqlService to handle GraphQL requests

src/app.module.ts

@@ -1,10 +1,22 @@
 import { Module } from '@nestjs/common';
+import { GraphQLModule } from '@nestjs/graphql';
+import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
+import { GraphqlModule } from './graphql/graphql.module';
+import { join } from 'path';
+import { PrismaService } from './prisma/prisma.service';
 
 @Module({
-  imports: [],
+  imports: [
+    GraphQLModule.forRoot<ApolloDriverConfig>({
+      driver: ApolloDriver,
+      playground: true,
+      autoSchemaFile: join(process.cwd(), 'src/graphql/schema.gql'),
+    }),
+    GraphqlModule,
+  ],
   controllers: [AppController],
-  providers: [AppService],
+  providers: [AppService, PrismaService],
 })
 export class AppModule {}