Files
bztmon-site/nginx/default.conf
T
jwright c1db5cec86 M4: security pass — strict CSP, header split, build-time scan
All JS moved to external /site.js → script-src 'self' with no inline JS,
hashes or eval. Full header set via nginx (CSP, nosniff, frame-deny,
referrer, permissions, COOP/CORP); HSTS stays at the CF edge. Shared
headers include avoids the location add_header reset footgun. Build-time
secret/inline-script/third-party scan gate. SECURITY.md documents posture.
2026-06-17 17:12:57 +10:00

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# nginx server config for the static site, baked into the image.
# Base image: nginxinc/nginx-unprivileged (runs as uid 101, listens on 8080).
# Read-only rootfs in k8s: /tmp and /var/cache/nginx are emptyDir mounts.
server {
listen 8080;
server_name _;
root /usr/share/nginx/html;
index index.html;
# Don't leak the nginx version.
server_tokens off;
# Security headers (CSP, nosniff, frame, etc.) — applied site-wide.
# Re-included in each location below that sets its own add_header, because
# a location-level add_header drops all inherited ones.
include /etc/nginx/security-headers.conf;
# ---- Caching -------------------------------------------------------------
# Astro emits content-hashed assets under /_astro/ — cache them hard.
location /_astro/ {
include /etc/nginx/security-headers.conf;
expires 1y;
add_header Cache-Control "public, immutable" always;
}
# Non-fingerprinted top-level script — revalidate so updates propagate.
location = /site.js {
include /etc/nginx/security-headers.conf;
add_header Cache-Control "no-cache" always;
}
# HTML is revalidated so deploys show up immediately.
location ~* \.html$ {
include /etc/nginx/security-headers.conf;
add_header Cache-Control "no-cache" always;
}
# ---- Routing -------------------------------------------------------------
location / {
try_files $uri $uri/ $uri.html =404;
}
error_page 404 /404.html;
location = /404.html {
internal;
}
# Compression
gzip on;
gzip_comp_level 6;
gzip_min_length 1024;
gzip_types text/plain text/css application/javascript application/json image/svg+xml application/xml application/rss+xml;
gzip_vary on;
}