core/nginx.conf.sigil

log_format custom '$remote_addr - $remote_user [$time_local] "$request" '
                  'origin=$http_origin allow_origin=$allow_origin status=$status '
                  '"$http_referer" "$http_user_agent"';

{{ $proxy_settings := "proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $http_connection; proxy_set_header Host $http_host; proxy_set_header X-Request-Start $msec;" }}
{{ $gzip_settings := "gzip on; gzip_min_length  1100; gzip_buffers  4 32k; gzip_types text/css text/javascript text/xml text/plain text/x-component application/javascript application/x-javascript application/json application/xml application/rss+xml font/truetype application/x-font-ttf font/opentype application/vnd.ms-fontobject image/svg+xml; gzip_vary on; gzip_comp_level  6;" }}

proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m max_size=1g
                 inactive=60m use_temp_path=off;
limit_conn_zone $binary_remote_addr zone=addr:10m;
limit_req_zone $binary_remote_addr zone=req_zone:10m rate=20r/s;

# Map to set CORS origin header
map $http_origin $allow_origin {
    default '';
    "https://localhost:3000" "https://localhost:3000";
    "https://testing.discours.io" "https://testing.discours.io";
    "https://testing3.discours.io" "https://testing3.discours.io";
}

{{ range $port_map := .PROXY_PORT_MAP | split " " }}
{{ $port_map_list := $port_map | split ":" }}
{{ $scheme := index $port_map_list 0 }}
{{ $listen_port := index $port_map_list 1 }}
{{ $upstream_port := index $port_map_list 2 }}

server {
    {{ if eq $scheme "http" }}
        listen [::]:{{ $listen_port }};
        listen {{ $listen_port }};
        server_name {{ $.NOSSL_SERVER_NAME }};
        access_log  /var/log/nginx/{{ $.APP }}-access.log custom;
        error_log   /var/log/nginx/{{ $.APP }}-error.log;
        client_max_body_size 100M;

    {{ else if eq $scheme "https" }}
        listen [::]:{{ $listen_port }} ssl http2;
        listen {{ $listen_port }} ssl http2;
        server_name {{ $.NOSSL_SERVER_NAME }};
        access_log  /var/log/nginx/{{ $.APP }}-access.log custom;
        error_log   /var/log/nginx/{{ $.APP }}-error.log;
        ssl_certificate {{ $.APP_SSL_PATH }}/server.crt;
        ssl_certificate_key {{ $.APP_SSL_PATH }}/server.key;
        ssl_protocols             TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers off;

        keepalive_timeout   70;
        keepalive_requests 500;
        proxy_read_timeout 3600;
        limit_conn addr 10000;
        client_max_body_size 100M;
    {{ end }}


    location / {
        proxy_pass http://{{ $.APP }}-{{ $upstream_port }};
        {{ $proxy_settings }}
        {{ $gzip_settings }}

        # Add CORS headers for non-OPTIONS requests
        add_header 'Access-Control-Allow-Origin' $allow_origin;
        add_header 'Access-Control-Allow-Methods' 'POST, GET, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
        add_header 'Access-Control-Allow-Credentials' 'true';

        # Handle CORS preflight requests
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' $allow_origin always;
            add_header 'Access-Control-Allow-Methods' 'POST, GET, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 1728000;
            add_header 'Content-Type' 'text/plain; charset=utf-8';
            add_header 'Content-Length' 0;
            return 204;
        }

        proxy_cache my_cache;
        proxy_cache_revalidate on;
        proxy_cache_min_uses 2;
        proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
        proxy_cache_background_update on;
        proxy_cache_lock on;

        # Connections and request limits increase (bad for DDos)
        limit_req zone=req_zone burst=10 nodelay;
    }

    location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
        proxy_pass  http://{{ $.APP }}-{{ $upstream_port }};
        expires 30d;
        add_header Cache-Control "public, no-transform";
    }

    location ~* \.(mp3|wav|ogg|flac|aac|aif|webm)$ {
        proxy_pass  http://{{ $.APP }}-{{ $upstream_port }};
        # Add CORS headers for audio files
        add_header 'Access-Control-Allow-Origin' $allow_origin always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;
        add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
    }


    error_page 400 401 402 403 405 406 407 408 409 410 411 412 413 414 415 416 417 418 420 422 423 424 426 428 429 431 444 449 450 451 /400-error.html;
  location /400-error.html {
    root /var/lib/dokku/data/nginx-vhosts/dokku-errors;
    internal;
  }

  error_page 404 /404-error.html;
  location /404-error.html {
    root /var/lib/dokku/data/nginx-vhosts/dokku-errors;
    internal;
  }

  error_page 500 501 503 504 505 506 507 508 509 510 511 /500-error.html;
  location /500-error.html {
    root /var/lib/dokku/data/nginx-vhosts/dokku-errors;
    internal;
  }

  error_page 502 /502-error.html;
  location /502-error.html {
    root /var/lib/dokku/data/nginx-vhosts/dokku-errors;
    internal;
  }

  include {{ $.DOKKU_ROOT }}/{{ $.APP }}/nginx.conf.d/*.conf;
}
{{ end }}


{{ range $upstream_port := $.PROXY_UPSTREAM_PORTS | split " " }}
upstream {{ $.APP }}-{{ $upstream_port }} {
{{ range $listeners := $.DOKKU_APP_WEB_LISTENERS | split " " }}
{{ $listener_list := $listeners | split ":" }}
{{ $listener_ip := index $listener_list 0 }}
{{ $listener_port := index $listener_list 1 }}
  server {{ $listener_ip }}:{{ $upstream_port }};
{{ end }}
}
{{ end }}