[Backend] apollo graphql

[ChenBingWei1201]

What is this PR for?

Aollop graphql setup

What type of PR is it?

[Feature]

Todos

What is the Github issue?

close #46

How should this be tested?

type pnpm backend in /NTUEECourseMap to open apollo playground

Screenshots (if appropriate)

Questions:

• Do the license files need updating? No
• Are there breaking changes for older versions? No
• Does this need new documentation? No

[YCK1130]

I cannot start the backend correctly. Check your ts.config and package.json.

[YCK1130]

LGTM