feat: 로그아웃 API 핸들러 구현

AuthController.java
AuthControllerTest.java
 - 로그아웃 핸들러 구현
 - 로그아웃 API 호출 시 정상 작동하는지 검증

src/main/java/io/devlabs/keytree/domains/auth/presentation/AuthController.java

@@ -0,0 +1,19 @@
+package io.devlabs.keytree.domains.auth.presentation;
+
+import io.devlabs.keytree.domains.auth.application.AuthService;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController()
+@RequiredArgsConstructor
+public class AuthController {
+
+    private final AuthService authService;
+
+    @PostMapping("/logout")
+    public String logout (HttpServletRequest request) {
+        return authService.logout(request);
+    }
+}

src/test/java/io/devlabs/keytree/domains/auth/presentation/AuthControllerTest.java

@@ -0,0 +1,50 @@
+package io.devlabs.keytree.domains.auth.presentation;
+
+import io.restassured.RestAssured;
+import io.restassured.response.ExtractableResponse;
+import io.restassured.response.Response;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.test.annotation.DirtiesContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_EACH_TEST_METHOD)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class AuthControllerTest {
+
+    @LocalServerPort
+    private int port;
+
+    @BeforeEach
+    void setUp() {
+        RestAssured.port = port;
+    }
+
+    @DisplayName("로그아웃 API")
+    @Test
+    void logout() {
+        // given
+
+        // when
+        ExtractableResponse<Response> response =
+                RestAssured.given()
+                        .log()
+                        .all()
+                        .contentType(MediaType.APPLICATION_JSON_VALUE)
+                        .when()
+                        .post("/logout")
+                        .then()
+                        .log()
+                        .all()
+                        .extract();
+
+        // then
+        assertThat(response.statusCode()).isEqualTo(HttpStatus.OK.value());
+    }
+}