ukmesh/nginx.app.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 {
    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 for static assets
    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;
    gzip_disable "MSIE [1-6]\.(?!.*SV1)";

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

    # WebSocket upgrade — must come before the /api block
    location = /ws {
        set $backend_upstream http://backend:3000;
        proxy_pass $backend_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 3600s;
    }
    location = /ws/ {
        return 308 /ws;
    }

    # API and health check proxy to backend
    location ~ ^/(api|healthz|readyz)(/|$) {
        set $backend_upstream http://backend:3000;
        proxy_pass $backend_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;
    }

    # 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;
    }

    # HopReach output volume. Metadata/progress are atomically replaced and
    # must be revalidated; completed PNGs may be cached briefly and are
    # cache-busted by run/tile progress in the native map.
    location = /rf-coverage/meta.json {
        alias /rf-coverage-data/output/meta.json;
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
    location = /rf-coverage/progress.json {
        alias /rf-coverage-data/output/progress.json;
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
    location ~ ^/rf-coverage/tiles/(standard|precision)/([0-9]+-[0-9]+\.png)$ {
        alias /rf-coverage-data/output/tiles/$1/$2;
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "public, max-age=30, stale-while-revalidate=300";
    }
    location ~ "^/rf-coverage/tiles/nodes/(n[0-9a-f]{24})/([0-9]+-[0-9]+\.png)$" {
        alias /rf-coverage-data/output/tiles/nodes/$1/$2;
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "public, max-age=30, stale-while-revalidate=300";
    }
    location /rf-coverage/ {
        return 404;
    }

    # robots.txt — disallow indexing of app domains
    location = /robots.txt {
        try_files $uri =404;
    }

    # SPA fallback
    location / {
        try_files $uri $uri/index.html /index.html;
    }

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

    # Always revalidate shell + service worker so deploys appear quickly.
    location = /index.html {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
    location = /sw.js {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
}