Replace php copy with curl for use with proxy
Replace php copy with curl for use with proxy

php `copy` connects directly...it does not use the specified `https_proxy` or `http_proxy` environment variables. A third parameter can be added to `copy` to use the proxy, but this needlessly complicates things. Replacing `copy` with `curl` enables the use of preset proxy environment variables.
passbolt/passbolt_docker_debian,passbolt/passbolt_docker,passbolt/passbolt_docker