error-pages/configuration.json

{
    "templates": [
        {
            "name": "ghost",
            "path": "./templates/ghost.html"
        }
    ],
    "output": {
        "file_extension": "html"
    },
    "pages": [
        {
            "code": 400,
            "message": "Bad Request",
            "description": "The server did not understand the request"
        },
        {
            "code": 401,
            "message": "Unauthorized",
            "description": "The requested page needs a username and a password"
        },
        {
            "code": 403,
            "message": "Forbidden",
            "description": "Access is forbidden to the requested page"
        },
        {
            "code": 404,
            "message": "Not Found",
            "description": "The server can not find the requested page"
        },
        {
            "code": 405,
            "message": "Method Not Allowed",
            "description": "The method specified in the request is not allowed"
        },
        {
            "code": 407,
            "message": "Proxy Authentication Required",
            "description": "You must authenticate with a proxy server before this request can be served"
        },
        {
            "code": 408,
            "message": "Request Timeout",
            "description": "The request took longer than the server was prepared to wait"
        },
        {
            "code": 409,
            "message": "Conflict",
            "description": "The request could not be completed because of a conflict"
        },
        {
            "code": 410,
            "message": "Gone",
            "description": "The requested page is no longer available"
        },
        {
            "code": 411,
            "message": "Length Required",
            "description": "The \"Content-Length\" is not defined. The server will not accept the request without it"
        },
        {
            "code": 412,
            "message": "Precondition Failed",
            "description": "The pre condition given in the request evaluated to false by the server"
        },
        {
            "code": 413,
            "message": "Payload Too Large",
            "description": "The server will not accept the request, because the request entity is too large"
        },
        {
            "code": 416,
            "message": "Requested Range Not Satisfiable",
            "description": "The requested byte range is not available and is out of bounds"
        },
        {
            "code": 429,
            "message": "Too Many Requests",
            "description": "Too many requests in a given amount of time"
        },
        {
            "code": 500,
            "message": "Internal Server Error",
            "description": "The server met an unexpected condition"
        },
        {
            "code": 502,
            "message": "Bad Gateway",
            "description": "The server received an invalid response from the upstream server"
        },
        {
            "code": 503,
            "message": "Service Unavailable",
            "description": "The server is temporarily overloading or down"
        },
        {
            "code": 504,
            "message": "Gateway Timeout",
            "description": "The gateway has timed out"
        },
        {
            "code": 505,
            "message": "HTTP Version Not Supported",
            "description": "The server does not support the \"http protocol\" version"
        }
    ]
}