docs: http basic 적용

Author: dlsrks1021

backend/src/main/java/io/f1/backend/global/config/SecurityConfig.java

@@ -87,6 +87,7 @@ public SecurityFilterChain userFilterChain(HttpSecurity http) throws Exception {
                                                         userInfo.userService(
                                                                 customOAuthUserService))
                                         .successHandler(oAuthSuccessHandler))
+				.httpBasic(Customizer.withDefaults())
                 .logout(
                         logout ->
                                 logout.logoutUrl("/logout")