bookstack-ppm/app/default.conf

server {
    listen 8888;
    listen [::]:8888;

    server_name _;
    root /app/public/;

    client_max_body_size 1000m;
    client_body_timeout 120s; # Default is 60, May need to be increased for very large uploads
    client_body_buffer_size 128k;

    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self'; connect-src 'self'; font-src 'self'; form-action 'self'; frame-ancestors 'none'; report-uri https://<YOUR_ACCOUNT>.report-uri.com/r/d/csp/enforce; report-to default;" always;
    add_header Expect-CT "enforce; max-age=604800; report-uri=https://<YOUR_ACCOUNT>.report-uri.com/r/d/ct/enforce";
    add_header Feature-Policy "accelerometer 'none'; ambient-light-sensor 'none'; encrypted-media 'none'; camera 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; midi 'none'; payment 'none'; sync-xhr 'none'; usb 'none'; vr 'none'";
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload" always;
    add_header Referrer-Policy "strict-origin";
    add_header Report-To "{'group':'default','max_age':31536000,'endpoints':[{'url':'https://<YOUR_ACCOUNT>.report-uri.com/a/d/g'}],'include_subdomains':true}";
    add_header NEL "{'report_to':'default','max_age':31536000,'include_subdomains':true}";
    add_header X-Content-Type-Options nosniff;

    # Firefox CSP bug workaround - https://bugzilla.mozilla.org/show_bug.cgi?id=1262842
    location ~ \.svg$ {
       add_header Content-Security-Policy "default-src 'none'; frame-ancestors 'none'; style-src 'self' 'unsafe-inline'";
    }

    location / {
        try_files $uri @ppm;
    }

    location ~* \.(jpg|jpeg|gif|png|ico|css|js|html|xml|txt)$ {
        access_log        off;
        log_not_found     off;
        expires           360d;
    }

    # PHP-PM is doing its thing
    location @ppm {
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_pass http://127.0.0.1:8080;
    }

    # Block access to PHP files
    location ~* \.(php|php3|php4|php5|php7|phtml|inc)$ {
        deny all;
    }

    # Block access to stuff begining with .
    location ~ /\. {
        access_log off;
        log_not_found off; 
        deny all;
    }
}