worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    types {
        application/manifest+json  webmanifest;
    }

    sendfile off;

    keepalive_timeout 65;

    server {
        listen 80;
        server_name _;

        root /opt/app/build;

        # all assets are either static or contain hash in filename, cache forever
        location ^~ /assets/ {
            add_header Cache-Control "public, max-age=31536000, s-maxage=31536000, immutable";
            try_files $uri =404;
        }

        # all workbox scripts are compiled with hash in filename, cache forever
        location ^~ /workbox- {
            add_header Cache-Control "public, max-age=31536000, s-maxage=31536000, immutable";
            try_files $uri =404;
        }

        location / {
            autoindex off;
            expires off;
            add_header Cache-Control "public, max-age=0, s-maxage=0, must-revalidate" always;
            try_files $uri /index.html =404;
        }

        location /backend {
            expires off;
            add_header Cache-Control "public, max-age=0, s-maxage=0, must-revalidate" always;

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header Host $host;

            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_redirect off;

            rewrite ^/backend/?(.*) /$1 break;
            proxy_pass http://backend:8080; 
        }
    }
}