README

Apache HTTPd

Alias /http-errors /your/errorpages/repo/root/http-errors
ErrorDocument 400 /http-errors/400.html
ErrorDocument 401 /http-errors/401.html
ErrorDocument 403 /http-errors/403.html
ErrorDocument 404 /http-errors/404.html
ErrorDocument 405 /http-errors/405.html
ErrorDocument 406 /http-errors/406.html
ErrorDocument 408 /http-errors/408.html
ErrorDocument 413 /http-errors/413.html
ErrorDocument 414 /http-errors/414.html
ErrorDocument 417 /http-errors/417.html
ErrorDocument 500 /http-errors/500.html
ErrorDocument 502 /http-errors/502.html
ErrorDocument 503 /http-errors/503.html
ErrorDocument 504 /http-errors/504.html

Composer

"scripts": {
    "post-autoload-dump": [
      "@build-error-pages"
    ],
    "build-error-pages": [
      "ByTIC\\HttpErrorPages\\Composer\\ScriptHandler::build"
    ]
},

"extra": {
    "http-error-pages": {
        "dist_path": "/public/http-errors"
        "suggestion_links" : {
            "Home": "https://mydomain.com/",
            "Support": "mailto:support@mydomain.com"
        }
    }
}