Securing HTTP Response Headers Using SecurityFilterChain

@Configuration
@EnableWebSecurity
public class SecurityHeaderConfig {
 
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        return http
            .headers(headers -> headers
                .contentSecurityPolicy(csp -> csp
                    .policyDirectives("default-src 'self'; frame-ancestors 'none';")
                )
                .httpStrictTransportSecurity(hsts -> hsts
                    .includeSubDomains(true)
                    .maxAgeInSeconds(31536000)
                )
                .frameOptions(HeadersConfigurer.FrameOptionsConfig::deny)
            )
            .build();
    }
}