update installation instructions

Author: simonLeary42

README.md

@@ -55,6 +55,7 @@ See the Docker Compose environment (`tools/docker-dev/`) for an (unsafe for prod
        - `COMPOSER_ALLOW_SUPERUSER=1 composer --no-dev --no-scripts --no-plugins install`
      - JS Libraries
        - `npm install`
+       - `npx copy-files-from-to`
    - `httpd` `DocumentRoot` set to `webroot/`
    - `httpd` Authentication
      - Any authentication will do as long as it defines `REMOTE_USER`, `givenName`, `sn`, and `mail`