Support Base URL

[kevincobain2000]

Following settings could be via env and the fetch('api needs to prefix the BASE_URL in the tsx files

[aduser@qasci401z query-craft]$ cat next.config.mjs
/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  optimizeFonts: false,
  basePath: '/query-craft'
};