HTTPS issue when using Cloudflare Tunnel due to fixed HTTP protocol in axiosInstance

[diazmateus]

When creating a tunnel with Cloudflare to expose my Umbrel instance, the tunnel creation works without problems. However, when using HTTPS, I face issues accessing the new URL. Since I am using HTTPS, all requests must be executed with HTTPS; otherwise, the browser blocks requests made via HTTP.

Identified Cause:
After investigating and debugging the system, I realized that the issue occurs because, in the file /containers/app-proxy/utils/manager.js, where axios is instantiated, the HTTP protocol is being used as a fixed value instead of reading the variable from the constants defined in the const.js file.

Relevant Code:
The code snippet where the issue occurs is as follows:

const CONSTANTS = require('./const.js');

const axiosInstance = axios.create({
    baseURL: `http://${CONSTANTS.MANAGER_IP}:${CONSTANTS.MANAGER_PORT}`,
    headers: {
        common: {
            "User-Agent": `${package.name}/${package.version}`
        }
    }
});

The issue is in the line:

baseURL: `http://${CONSTANTS.MANAGER_IP}:${CONSTANTS.MANAGER_PORT}`

As a suggestion to resolve the issue, the line could be modified to:

baseURL: `${CONSTANTS.APP_PROTOCOL}://${CONSTANTS.MANAGER_IP}:${CONSTANTS.MANAGER_PORT}`

I have submitted a pull request with the requested change: #1841.