add exception handler to spring boot

add exception handler to spring boot.md

file: infra/GlobalExceptionHandler.java

@ControllerAdvice
public class GlobalExceptionHandler {

 @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<?> handleJakartaValidations(MethodArgumentNotValidException e, HttpServletRequest r) {
        Map<String, String> errors = new HashMap<>();

        // Alternativa de loop: for (ObjectError error : e.getBindingResult().getAllErrors()) {
        e.getBindingResult().getAllErrors().forEach((error) -> {
            String fieldName = ((FieldError) error).getField();
            String errorMessage = error.getDefaultMessage();
            errors.put(fieldName, errorMessage);
        });

        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(errors.toString());
    }

}

add swagger to API documentation

file: pom.xml

<!-- https://mvnrepository.com/artifact/org.springdoc/springdoc-openapi-starter-webmvc-ui -->
<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
    <version>2.8.4</version>
</dependency>