netlify.toml

[build]
  command = "npm run build"
  publish = "dist"

[build.environment]
  NODE_VERSION = "20"

# Single-page app: every unknown path renders the game shell instead of a 404.
# Real files are served before this rule is ever consulted.
[[redirects]]
  from = "/*"
  to = "/index.html"
  status = 200

# Build output (Vite content hashes) and art assets (manual _v1 suffix) both
# change filename whenever their bytes change, so they can be cached forever.
[[headers]]
  for = "/assets/*"
  [headers.values]
    Cache-Control = "public, max-age=31536000, immutable"

# Root-level icons and social image are referenced by fixed names, so they get a
# short cache and must be revalidated.
[[headers]]
  for = "/*.png"
  [headers.values]
    Cache-Control = "public, max-age=86400, must-revalidate"

[[headers]]
  for = "/*.jpg"
  [headers.values]
    Cache-Control = "public, max-age=86400, must-revalidate"

[[headers]]
  for = "/manifest.json"
  [headers.values]
    Cache-Control = "public, max-age=3600, must-revalidate"

# index.html must never be cached, otherwise clients keep loading old asset hashes.
[[headers]]
  for = "/index.html"
  [headers.values]
    Cache-Control = "public, max-age=0, must-revalidate"

[[headers]]
  for = "/*"
  [headers.values]
    X-Content-Type-Options = "nosniff"
    X-Frame-Options = "SAMEORIGIN"
    Referrer-Policy = "strict-origin-when-cross-origin"
    Permissions-Policy = "camera=(), microphone=(), geolocation=(), interest-cohort=()"
    Cross-Origin-Opener-Policy = "same-origin"
    # The game ships no external scripts and makes no network calls. Google Fonts
    # is the only third-party origin left: stylesheet from fonts.googleapis.com,
    # font files from fonts.gstatic.com.
    # 'unsafe-inline' in style-src covers the inline <style> block in index.html
    # and the inline style attributes React writes for HUD animation.
    Content-Security-Policy = "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com data:; img-src 'self' data: blob:; media-src 'self'; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'; base-uri 'self'; form-action 'self'; frame-ancestors 'self'; object-src 'none'"