Follow the steps here to migrate the project from Apollo Server version 3 to version 4: https://www.apollographql.com/docs/apollo-server/migration.
The migration will improve usability, speed, and readability of the application as described .

The front-end service is getting the error:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://photobook-be.herokuapp.com/. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 404.

Add CORS ORIGIN support to the repository, likely by adding app.enableCors() in main.ts, and also following this link to add CORS origin support in the GraphQLModule in app.module.ts

Add graphql and apollo-graphql to the repository. Additionally, generate the appropriate resource(s) for the Image model.

There should be a folder created called Image with the following files in it:

• image.graphql - GraphQL schema (SDL)
• image.module.ts- organize and compartmentalize GraphQL imports, resolvers, services
• image.resolver.ts - uses HTTP decorators to turn GraphQL operations into fetched data
• image.service.ts - integration with Prisma to make queries and mutations to database

Add appropriate documentation and comments to the code base. Also clean up code to enhance readability and eliminate redundancy.

This could involve tasks like moving code chunks into separate functions, renaming files etc.

Follow the guide here to deploy the backend service using Heroku https://www.apollographql.com/docs/apollo-server/deployment/heroku

Goals are to:

• Add Apollo-Server to the project
• Create a Heroku account
• Add integration with GitHub for deployment
• Configure the ci.yml file to add continuous deployment support (i.e. when pushes to main branch pass the testing suite)