- Use kebab-case 'report-only' in web-ui configs to match thingsboard.yml
- Add log.warn for unrecognized X-Frame-Options values in customizer
- Replace @Configuration with @Component on HttpSecurityHeadersProperties
- Add comment explaining '!== false' vs truthiness pattern in server.ts
Fix security issues from penetration test report:
- M2: Add configurable X-Frame-Options and CSP headers (disabled by default)
- L2: Add X-Content-Type-Options and Referrer-Policy headers (enabled by default)
- L3: Make CORS allowed-origin-patterns configurable via TB_CORS_* env vars
Root cause: ThingsboardSecurityConfiguration called .disable() on the entire
HeadersConfigurer, which removed ALL security headers including Cache-Control.
Fix uses defaultsDisabled() + selective header enablement via a new
HttpSecurityHeadersCustomizer component.
Both Spring Boot (tb-node) and Express.js (web-ui) share the same
SECURITY_HEADERS_* environment variables for consistent configuration
across monolith and microservice deployments.