Fix: security auth 추가

Author: ChooSeoyeon

src/main/java/beachcombine/backend/common/config/WebSecurityConfig.java

@@ -45,6 +45,7 @@ SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
                 .addFilter(jwtAuthorizationFilter())
                 .addFilterBefore(jwtExceptionFilter(), JwtAuthorizationFilter.class)
                 .authorizeRequests(authorize -> authorize
+                        .antMatchers("/auth/**").permitAll()
                         .antMatchers("/admin/**").access("hasRole('ROLE_ADMIN')")
                         .anyRequest().authenticated() // 그외 나머지 요청은 인증 필요
                 )// 요청에 대한 사용권한 체크