server {
    listen 5173;
    server_name _;
    root /usr/share/nginx/html;

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

    location /api/ {
        proxy_pass http://${BACKEND_HOST}:${BACKEND_PORT};
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    location /ws/ {
        proxy_pass http://${BACKEND_HOST}:${BACKEND_PORT};
        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-Forwarded-Host $http_host;
        proxy_read_timeout 75s;
    }

    # SIP over WebSocket для встроенного WebRTC-телефона. Переменная и
    # Docker DNS позволяют фронту стартовать даже до sip-сервиса.
    location = /sip-ws {
        resolver 127.0.0.11 ipv6=off valid=10s;
        set $sip_backend sip;
        proxy_pass http://$sip_backend:8088/ws;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    location ~* \.(?:css|js|woff2?|png|svg)$ {
        try_files $uri =404;
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

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