* Configure all sources with CSP_* vars. Space separated source list.
* Fall back to `config.x.content_security_policy.*`
* Move our sources to fizzy-saas
References https://github.com/basecamp/fizzy-saas/pull/24
External sources:
- challenges.cloudflare.com for Turnstile (script-src, frame-src)
- storage.basecamp.com for Active Storage (connect-src)
User tools: loosen style/img/font/media/worker-src to avoid fighting
accessibility extensions, privacy tools, and custom fonts.
Loosen font-src and add media-src to allow browser extensions like
accessibility fonts (OpenDyslexic) and user style managers to work
without CSP violations.
Add default-src and connect-src directives to close security gaps where
unspecified directives were implicitly allowing all sources.
Default to a very narrow policy since there are no CDNs or third-party
resources to contend with.
Configurable via:
- config.x.content_security_policy.* for fizzy-saas gem overrides
- DISABLE_CSP to skip entirely
- CSP_REPORT_ONLY to enable report-only mode
- CSP_REPORT_URI for violation reporting
Jeremy Daer