Update backend

[yourvivian]

Description

• Added a trip name field for users to specify names for their trips.
• Updated the trip image field to be optional.
• Updated the router to include CRUD operations for trips.
• Updated package.json to change the main file to src/server.ts and added TypeScript dependencies.
• Updated package-lock.json with new dependencies.

[nickbar01234]

Changes look good so far! A couple of details to consider about:

1. Determine whether a package should be in dependencies or devDependencies
2. Potentially updating schema.prisma

• A trip has many activities, so we should reflect that relationship here. You may find this helpful
• When we delete a trip or modify it, we need to ensure that all the relationships are properly updated.
• For a 1-to-many relationship, deleting a trip means that all associated activities should be deleted. The native way to do it using Prisma is with referential action
• This means that if you allow PUT /trips/:id to modify activities and participants, you should check whether the relationship is consistent after the API call.

[trihoang0809]

LGTM!

Change requested has been opened in a new Github issue.