Simple way to get IP-address from request in Express.

location.app-controller.ts

async getMyIp(req: Request, res: Response) {
        const ip =
            req.headers["cf-connecting-ip"] ||
            req.headers["x-real-ip"] ||
            req.headers["x-forwarded-for"] ||
            req.socket.remoteAddress || "";
        
        return res.status(200).send({ip});
    }