default.conf.template

server {
    listen       ${PORT};
    listen  [::]:${PORT};
    server_name  localhost;
    root /usr/share/nginx/html;

    access_log  /var/log/nginx/server.access.log  main;

    # P03: compress text responses (the 820 kB bundle shrinks to about a quarter), the proxied API's JSON lists included.
    # text/html is always compressed once gzip is on.
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 5;
    gzip_min_length 1024;
    gzip_types application/javascript text/javascript text/css application/json image/svg+xml text/plain application/xml;

    # P03: files built by "ng build" have an 8 character hash in their name (outputHashing is "all"), so a changed file has a new name and the old one can be kept for a year. Unhashed files such as favicon.ico are not matched.
    location ~ "-[A-Z0-9]{8}\.(?:js|css|woff2?)$" {
        add_header Cache-Control "public, max-age=31536000, immutable";
        try_files $uri =404;
    }

    # P03: index.html names the current bundle files, so the browser must ask each time whether it changed (a cheap 304 when it did not).
    location = /index.html {
        add_header Cache-Control "no-cache";
    }

    location / {
        try_files $uri $uri/ /index.html;
    }

    location /api/ {
        proxy_pass ${services__timeentryapi__https__0};
        proxy_http_version 1.1;
        # P03: HTTP/1.1 with an empty Connection header lets nginx keep the connection to the API open (the default is "close").
        # It is reused only if proxy_pass names an upstream block with "keepalive"; here it names a URL, so this is the prerequisite, not the whole fix.
        proxy_set_header Connection "";
        proxy_ssl_server_name on;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        rewrite ^/api(/.*)$ $1 break;
    }
}