gzip on;
gzip_comp_level 6;
gzip_min_length 1024;
gzip_types application/javascript application/json application/manifest+json image/svg+xml text/css text/plain;

upstream model_delivery_api {
  server 127.0.0.1:3001;
  keepalive 16;
}

# Public application listener. Local administration is deliberately unavailable.
server {
  listen 38080;
  server_name _;
  root /usr/share/nginx/html;
  index index.html;
  client_max_body_size 64k;

  add_header X-Content-Type-Options nosniff always;
  add_header Referrer-Policy same-origin always;
  add_header X-Frame-Options DENY always;

  location = /local-admin { return 404; }
  location ^~ /local-admin/ { return 404; }
  location = /api/local-admin { return 404; }
  location ^~ /api/local-admin/ { return 404; }

  location /api/ {
    proxy_pass http://model_delivery_api/;
    proxy_http_version 1.1;
    proxy_set_header Connection "";
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;
    proxy_connect_timeout 5s;
    proxy_read_timeout 20s;
    add_header Cache-Control "no-store" always;
  }

  location /assets/ {
    try_files $uri =404;
    expires 1y;
    add_header Cache-Control "public, max-age=31536000, immutable";
  }

  location = /sw.js {
    try_files $uri =404;
    add_header Cache-Control "no-cache";
  }

  location = /manifest.webmanifest {
    try_files $uri =404;
    default_type application/manifest+json;
    add_header Cache-Control "no-cache";
  }

  location / {
    try_files $uri $uri/ /index.html;
    add_header Cache-Control "no-cache";
  }
}

# Administration listener. Publish this through a separate DSM reverse-proxy
# rule restricted to the LAN; never expose or port-forward it to the internet.
server {
  listen 38081;
  server_name _;
  root /usr/share/nginx/html;
  index index.html;
  client_max_body_size 64k;

  add_header X-Content-Type-Options nosniff always;
  add_header Referrer-Policy same-origin always;
  add_header X-Frame-Options DENY always;

  location /api/ {
    proxy_pass http://model_delivery_api/;
    proxy_http_version 1.1;
    proxy_set_header Connection "";
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;
    proxy_connect_timeout 5s;
    proxy_read_timeout 20s;
    add_header Cache-Control "no-store" always;
  }

  location /assets/ {
    try_files $uri =404;
    expires 1y;
    add_header Cache-Control "public, max-age=31536000, immutable";
  }

  location = /sw.js {
    try_files $uri =404;
    add_header Cache-Control "no-cache";
  }

  location = /manifest.webmanifest {
    try_files $uri =404;
    default_type application/manifest+json;
    add_header Cache-Control "no-cache";
  }

  location / {
    try_files $uri $uri/ /index.html;
    add_header Cache-Control "no-cache";
  }
}