# nginx server block for bchanot.fr static site.
# Container listens on port 80; host port is configured via docker-compose
# (PORT env var). A host-level reverse proxy (nginx, Traefik, Caddy) should
# terminate TLS and proxy_pass to http://127.0.0.1:${PORT}.

server {
    listen 80;
    listen [::]:80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # Security headers. HSTS is intentionally NOT set here — leave it to the
    # outer reverse proxy that terminates TLS, otherwise it may be sent over
    # plain HTTP between proxy and container.
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "geolocation=(), microphone=(), camera=(), payment=()" always;
    # CSP: inline CSS + JS are allowed (project convention), fonts from Google.
    add_header Content-Security-Policy "default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; script-src 'self' 'unsafe-inline'; img-src 'self' data:; base-uri 'self'; form-action 'self'; frame-ancestors 'self'" always;

    # Forwarded headers — trust the upstream reverse proxy.
    real_ip_header X-Forwarded-For;
    set_real_ip_from 0.0.0.0/0;

    # Compression.
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/html
        text/javascript
        application/javascript
        application/json
        application/xml
        application/pdf
        image/svg+xml;

    # Long cache for the PDF (regenerated rarely, content-hash not used).
    location ~* \.pdf$ {
        expires 7d;
        add_header Cache-Control "public, max-age=604800";
    }

    # Short cache for HTML so content updates land fast.
    location ~* \.html$ {
        expires 1h;
        add_header Cache-Control "public, max-age=3600, must-revalidate";
    }

    # Long cache for favicon + image assets (rarely change).
    location ~* \.(?:ico|svg|png|jpg|jpeg|gif|webp)$ {
        expires 30d;
        add_header Cache-Control "public, max-age=2592000, immutable";
        access_log off;
    }

    # Logs to stdout/stderr (default in nginx:alpine).
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log warn;

    # Block access to dotfiles (defense-in-depth — none are shipped anyway).
    location ~ /\. {
        deny all;
        return 404;
    }

    # Default: serve files, fall back to 404.
    location / {
        try_files $uri $uri/ =404;
    }
}