Restaurant reservations API server

A simple Java & Spring server application for managing restaurant reservations through REST APIs.

How to run it?

Execute ./mvnw spring-boot:run and open SwaggerUI at http://localhost:8080/swagger-ui.html
You can run Postman collection with basic tests from postman/Reservation API.postman_collection.json
Also check out the markdown API docs (generated via OpenAPI Generator)

Implement REST API for restaurant reservations management by using Spring Boot. The following features should be supported:

Java 17, Maven, Spring Boot (Data JPA, Security, Web, Validation), H2 Embedded DB;
JUnit 5 + JaCoCo, Postman for API testing;
OpenAPI 3 and SwaggerUI (OpenAPI UI);

OpenAPI spec & swaggerUI
- Currently, swagger/openapi doesn't seem to support java.time.LocalTime (and other time classes)
  - A GitHub issue for reference
  - In the spec/UI these objects will be rendered like this:
```
  "time": {
    "hour": 0,
    "minute": 0,
    "second": 0,
    "nano": 0
  }
```
    which is not what we'd like to see and use, but anyway, the API works :) It could be worked around by taking java.time.LocalDateTime instead two separate date and time objects.
- API response docs - by not using @ResponseStatus(...) on controller handler methods we don't utilize the automatic response documentation. Personally I'd prefer to use ResponseEntity.status(...).body(...).build(). Same applies for @ExceptionHandler methods. Alternatively response statuses can be verbosely described via annotations
API and DB models could be improved; For now we rely on Hibernate to define the DB schema and app code to init tables
Nothing more than the required model (reservation) and properties (name, date, time, number of people) has been defined and implemented. A better real-world app would (of course) consist of richer structure and relations