**Description** Set up the PostgreSQL database for the Spillkveld application, including the database schema, example data, and documentation. **Tasks** - [x] Create server/db/schema.sql with the required fields and constraints. - [x] Create server/db/seed.sql containing the 12 existing prototype games. - [x] Test schema creation and seed insertion locally. - [x] Verify that running the seed multiple times does not create duplicates. - [x] Test database constraints for invalid player counts. - [x] Document database setup and testing in docs/database.md. - [ ] Create a pull request for review and integration.