penpot/docker/images/files/nginx.conf.template

worker_processes auto;
pid /tmp/nginx.pid;
include /etc/nginx/overrides/main.d/*.conf;

events {
    worker_connections 65535;
    multi_accept on;
}

http {
    client_body_temp_path /tmp/client_temp;
    proxy_temp_path       /tmp/proxy_temp_path;
    fastcgi_temp_path     /tmp/fastcgi_temp;
    uwsgi_temp_path       /tmp/uwsgi_temp;
    scgi_temp_path        /tmp/scgi_temp;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_requests 30;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    server_tokens off;

    reset_timedout_connection on;
    client_body_timeout 30s;
    client_header_timeout 30s;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    error_log /dev/stderr;

    # Access log enriched with upstream diagnostics: what the backend
    # answered (us), how long it took to connect to it (uct), how long it
    # took to answer (urt) and which internal address served the request
    # (ua). With proxy_pass on variables there is no upstream keepalive,
    # so uct measures one real TCP connection per request.
    log_format penpot_upstream '$remote_addr - $remote_user [$time_local] "$request" '
                               '$status $body_bytes_sent "$http_referer" "$http_user_agent" '
                               'us=$upstream_status uct=$upstream_connect_time '
                               'urt=$upstream_response_time ua=$upstream_addr';
    access_log /dev/stdout penpot_upstream;

    proxy_connect_timeout 300s;
    proxy_send_timeout 300s;
    proxy_read_timeout 300s;
    send_timeout 300s;

    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_static on;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;

    gzip_types text/plain text/css text/javascript application/javascript application/json application/transit+json image/svg+xml application/wasm;

    proxy_buffer_size 16k;
    proxy_busy_buffers_size 24k; # essentially, proxy_buffer_size + 2 small buffers of 4k
    proxy_buffers 32 4k;

    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    # Link preview crawlers; their requests for the application root
    # are served with dynamic Open Graph metadata from the backend.
    map $http_user_agent $penpot_link_preview_agent {
        default 0;
        "~*(slackbot|discordbot|twitterbot|facebookexternalhit|facebookcatalog|whatsapp|telegrambot|linkedinbot|skypeuripreview|pinterestbot|redditbot|embedly|iframely|mastodon|bluesky|applebot|googlebot|bingbot|bingpreview|duckduckbot|mattermost-bot|opengraph[.]xyz|twitter card validator)" 1;
    }

    proxy_cache_path /tmp/cache/ levels=2:2 keys_zone=penpot:20m;
    proxy_cache_methods GET HEAD;
    proxy_cache_valid any 48h;
    proxy_cache_key "$host$request_uri";

    proxy_http_version 1.1;
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Scheme $scheme;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    include /etc/nginx/overrides/http.d/*.conf;

    server {
        listen 8080 default_server reuseport backlog=16384;
        ${PENPOT_IPV6_LISTEN_DIRECTIVE}
        server_name _;

        client_max_body_size $PENPOT_HTTP_SERVER_MAX_BODY_SIZE;
        charset utf-8;

        etag off;
        proxy_hide_header X-Powered-By;
        include /etc/nginx/nginx-security-headers.conf;

        root /var/www/app/;

        ${PENPOT_PUBLIC_PATH_DIRECTIVES}

        location @handle_redirect {
            set $redirect_uri "$upstream_http_location";
            set $redirect_host "$upstream_http_x_host";
            set $redirect_cache_control "$upstream_http_cache_control";
            set $real_mtype "$upstream_http_x_mtype";

            proxy_buffering off;

            proxy_set_header Host "$redirect_host";
            proxy_set_header Authorization "";
            proxy_hide_header etag;
            proxy_hide_header x-amz-id-2;
            proxy_hide_header x-amz-request-id;
            proxy_hide_header x-amz-meta-server-side-encryption;
            proxy_hide_header x-amz-server-side-encryption;
            proxy_ssl_server_name on;
            proxy_pass $redirect_uri;

            include /etc/nginx/nginx-security-headers.conf;
            add_header x-internal-redirect "$redirect_uri";
            add_header x-cache-control "$redirect_cache_control";
            add_header cache-control "$redirect_cache_control";
            add_header content-type "$real_mtype";
        }

        location /assets {
            proxy_set_header Host $proxy_host;
            proxy_pass $PENPOT_BACKEND_URI/assets;
            recursive_error_pages on;
            proxy_intercept_errors on;
            error_page 301 302 307 = @handle_redirect;

            include /etc/nginx/overrides/assets.d/*.conf;
        }

        location /internal/assets {
            internal;
            alias /opt/data/assets;
            include /etc/nginx/nginx-security-headers.conf;
            add_header x-internal-redirect "$upstream_http_x_accel_redirect";
        }

        location = /link-preview {
            proxy_pass $PENPOT_BACKEND_URI/link-preview$is_args$args;
        }

        location /api/export {
            proxy_set_header Host $proxy_host;
            proxy_pass $PENPOT_EXPORTER_URI;
        }

        location /api {
            proxy_set_header Host $proxy_host;
            proxy_pass $PENPOT_BACKEND_URI/api;
            proxy_buffering off;
        }

        location /plugins {
            alias /var/www/app/plugins;
            proxy_http_version 1.1;
        }

        location /readyz {
            access_log off;
            proxy_set_header Host $proxy_host;
            proxy_pass $PENPOT_BACKEND_URI$uri$is_args$args;
        }

        location /ws/notifications {
            proxy_set_header Host $proxy_host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_pass $PENPOT_BACKEND_URI/ws/notifications;
        }

        include /etc/nginx/overrides/server.d/*.conf;

        location / {
            include /etc/nginx/overrides/location.d/*.conf;

            # Regenerated from the environment on every container start
            # (see nginx-entrypoint.sh) while its URL is only versioned by
            # the build, so a flags only restart leaves the URL untouched.
            # Caching it like a build asset would keep returning users on
            # the previous PENPOT_FLAGS for up to a week.
            location = /js/config.js {
                include /etc/nginx/nginx-security-headers.conf;
                add_header Cache-Control "no-store, no-cache, max-age=0" always;
            }

            location ~* \.(js|css|jpg|png|svg|gif|ttf|woff|woff2|wasm|map)$ {
                include /etc/nginx/nginx-security-headers.conf;
                add_header Cache-Control "public, max-age=604800" always; # 7 days
            }

            location ~ ^/[^/]+/(.*)$ {
                return 301 " ${PENPOT_PUBLIC_PATH}404";
            }

            if ($penpot_link_preview_agent) {
                rewrite ^/$ /link-preview last;
            }

            include /etc/nginx/nginx-security-headers.conf;
            add_header Cache-Control "no-store, no-cache, max-age=0" always;
            try_files $uri /index.html$is_args$args /index.html =404;

        }
    }

    # Dedicated health endpoint consumed by the nginx-prometheus-exporter
    # sidecar (deployed by ops, scraping http://127.0.0.1:8082/stub_status).
    # `listen 8082` binds every interface and sits out of the public server:
    # a compose port mapping delivers traffic to the container address, never
    # to loopback, so only the published port decides who gets in from
    # outside the host. Counts client-side connections only; it says nothing
    # about the upstream pools.
    server {
        listen 8082;
        server_name _;

        access_log off;

        location = /stub_status {
            stub_status;
        }
    }
}