Add BACKEND_URL as variable

before_script:

  # https://stackoverflow.com/a/75624610

  # - cp ${PRODUCTION_ENV_FILE} .env.production

  - cp ${PRODUCTION_ENV_FILE} .env.production

    # define cache dir & use it npm!

  - npm ci --cache node_modules/ --prefer-offline

#   # monorepo users: run secondary install actions

<script>

	import axios from 'axios';

	const backend_url = process.env.VUE_APP_BACKEND_URL;

	let upload_url1 = `${backend_url}/upload_path1`

	export default {

		data(){

			return {

				formData.append('file', this.file);

				axios.post(

					'/single-file',

					upload_url1,

					formData,

					{

						headers: {