i am using next js 14 app router. i am doing the admin panel now.
so for authentication, i decided to use middleware. but as soon as i started to use middleware i got a problem [TypeError: Failed to parse URL from /api/v0/…] .
i am using fetch method for making requests to my api (which is running on docker container on localhost:8000).

so let me show you a bit of related code :
assume i have a function to make request to my backend , verify the access token is valid

// AdminAuth.js file for requests to backend

const baseURL = "/api/v0/auth"

const tokenVerification = async acc_token => {
    const res = await fetch(`${baseURL}/token/verify`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(acc_token),
        credentials: "include",
    })

    if (!res.ok) {
        if (res.status === 401) {
            throw new Error("401")
        }
        throw new Error(`Error in token verification: ${res.statusText}`)
    }

    return res.json()
}

so in middleware, if i get the access_token from cookies and execute this:

// middleware.js
// ..

try{
    const res_token_verify = await AdminAuth.tokenVerification({
                token: acc_token,
            })
//..
}catch(err){
   console.log("maybe there was an error in verify =>>", err)
}

//..

i get this in terminal:
maybe there was an error in verify =>> [TypeError: Failed to parse URL from /api/v0/auth/token/verify]

what i did to solve the issue is i tried to hardcode baseUrl and it works on development machine, but when i want to check the app i am writing on my mobile device, i have to view it through the ip of development machine in my lan… so the baseurl is not correct when trying to work with app that way.
so how can i solve this problem?
this is also next.config.mjs file in root dir of my project :

/** @type {import('next').NextConfig} */
const nextConfig = {
    async rewrites() {
        return [
            {
                source: "/api/:path*",
                destination: "http://localhost:8000/api/:path*/",
            },
        ]
    },
}

export default nextConfig

i think its not working since i switched to middleware ?