ukmesh/nginx.website.conf

geo $mesh_trusted_edge {
    default 0;
    172.30.0.20 1;
    172.30.0.21 1;
    172.18.30.20 1;
    172.18.30.21 1;
}

map "$mesh_trusted_edge:$http_cf_connecting_ip" $mesh_client_ip {
    default $remote_addr;
    ~^1:([0-9A-Fa-f:.]+)$ $1;
}

map $uri $mesh_permissions_policy {
    default "geolocation=(), camera=(), microphone=()";
    ~^/(feed|repeater)?/?$ "geolocation=(self), camera=(), microphone=()";
}

server {
    # The remotely managed development-tunnel route still targets port 80.
    # Keep the hardened internal port for Compose health checks and Anubis.
    listen 80;
    listen 8080;
    root /usr/share/nginx/html;
    index index.html;
    resolver 127.0.0.11 valid=10s ipv6=off;
    include /etc/nginx/snippets/security-headers.conf;

    # Gzip compression — critical for large API responses (coverage ~26 MB → ~2-3 MB)
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript application/rss+xml application/atom+xml image/svg+xml;
    gzip_min_length 256;

    # Operator endpoints are never part of the public website origin.
    location ~ ^/(local-api|backend|ml-path-learner|operations|observer-registrations|metrics)(/|$) {
        return 404;
    }

    # Proxy API calls through to the app service so live stats work
    location /api/ {
        set $backend_api_upstream http://backend:3000;
        proxy_pass $backend_api_upstream;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $mesh_client_ip;
        proxy_set_header X-Forwarded-For $mesh_client_ip;
    }

    location = /readyz {
        set $backend_ready_upstream http://backend:3000;
        proxy_pass $backend_ready_upstream;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $mesh_client_ip;
        proxy_set_header X-Forwarded-For $mesh_client_ip;
    }

    # One canonical WebSocket contract. Both identity headers are overwritten
    # from the trusted edge mapping; caller forwarding chains are never passed.
    location = /ws {
        set $backend_ws_upstream http://backend:3000;
        proxy_pass $backend_ws_upstream;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $mesh_client_ip;
        proxy_set_header X-Forwarded-For $mesh_client_ip;
        proxy_read_timeout 86400;
    }
    location = /ws/ {
        return 308 /ws;
    }

    # Static SEO files — serve directly, not via SPA fallback
    location = /robots.txt {
        try_files $uri =404;
    }
    location = /sitemap.xml {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Content-Type application/xml;
        try_files $uri =404;
    }

    # OS Terrain 50 terrain tiles (terrarium-encoded PNG)
    location /terrain-tiles/ {
        alias /terrain-tiles/;
        include /etc/nginx/snippets/security-headers.conf;
        add_header Access-Control-Allow-Origin *;
        add_header Cache-Control "public, max-age=604800, immutable";
        try_files $uri =404;
    }

    # Prefer the prerendered route shell (for example /topology/index.html)
    # without redirecting the public URL to this container's internal port.
    location / {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        try_files $uri $uri/index.html /index.html;
    }

    location /assets/ {
        include /etc/nginx/snippets/security-headers.conf;
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    location = /index.html {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
}