[fix]예외 응답 상태코드 수정 (#12)

빈페이지 조회시 응답 코드 변경 400->404

src/main/java/org/kakaoshare/backend/domain/product/controller/ProductController.java

@@ -12,6 +12,7 @@
 import org.springframework.data.web.PageableDefault;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MissingServletRequestParameterException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -50,12 +51,17 @@ public ResponseEntity<?> getSimpleProductsInfo(@RequestParam("categoryId") Long
             Page<SimpleProductDto> simpleProductsPage = productService.getSimpleProductsPage(categoryId, pageable);
             return ResponseEntity.ok(simpleProductsPage);
         } catch (IllegalArgumentException e) {
-            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(e.getMessage());
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(e.getMessage());
         }
     }
 
     @ExceptionHandler(MethodArgumentTypeMismatchException.class)
     public ResponseEntity<?> handleMethodArgumentTypeMismatchException(MethodArgumentTypeMismatchException e) {
         return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
     }
+
+    @ExceptionHandler(MissingServletRequestParameterException.class)
+    public ResponseEntity<?> handleMissingServletRequestParameterException(MissingServletRequestParameterException e) {
+        return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
+    }
 }