Serverless Framework, apollo-server sample

graphql.js

const { ApolloServer, gql } = require('apollo-server-lambda');

// typeDefs
const typeDefs = gql`
  type Query {
    hello: String
  }
`;
const resolvers = {
  Query: {
    hello: () => 'Hello world!',
  },
};
const server = new ApolloServer({ 
  typeDefs, 
  resolvers,
  /*
  playground: {
    endpoint: "/dev/graphql"
  }
  */
});

exports.graphqlHandler = server.createHandler({
  cors: {
    origin: true,
    credentials: true,
  },
});

package.json

{
  "name": "sls_express7",
  "version": "1.0.0",
  "description": "",
  "main": "graphql.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "apollo-server-lambda": "^3.6.1",
    "graphql": "^16.2.0"
  },
  "devDependencies": {
    "serverless-offline": "^8.3.1"
  }
}

serverless.yml

service: apollo-lambda
# app and org for use with dashboard.serverless.com

frameworkVersion: "2"

plugins: 
 - serverless-offline

provider:
  name: aws
  runtime: nodejs14.x
  region: ap-northeast-1
  stage: dev  
  lambdaHashingVersion: 20201221

functions:
  graphql:
    handler: graphql.graphqlHandler
    events:
    - http:
        path: graphql
        method: post
        cors: true
    - http:
        path: graphql
        method: get
        cors: true