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security(headers): add HSTS to match the fleet baseline #7

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Merged
manderwall merged 1 commit into from
Jul 19, 2026
Merged

security(headers): add HSTS to match the fleet baseline #7

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4 changes: 4 additions & 0 deletions _headers
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,10 @@
# fonts.googleapis.com, files from fonts.gstatic.com) and OpenDyslexic
# (CSS + files from fonts.cdnfonts.com). Only fetched when a user opts in.
Content-Security-Policy: default-src 'self'; script-src 'self' https://cdn.jsdelivr.net; script-src-elem 'self' https://cdn.jsdelivr.net; worker-src 'self' blob:; img-src 'self' data: blob: https:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://fonts.cdnfonts.com; font-src 'self' data: https://fonts.gstatic.com https://fonts.cdnfonts.com; connect-src 'self' https://cdn.jsdelivr.net https://*.supabase.co https://api.web3forms.com; frame-ancestors 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; upgrade-insecure-requests
# Force HTTPS for a year, cover subdomains, and allow preloading — matches
# the fleet baseline used by the sibling companion apps. Cloudflare Pages
# already serves HTTPS-only; this makes the browser refuse any downgrade.
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
# Stop MIME-sniff overrides on JSON/JS payloads.
X-Content-Type-Options: nosniff
# Don't leak the URL path to outbound requests.
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